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Canadian maker Cass, the creator behind the Chaos Theory project, has answered a question few people thought to ask: what would happen if an Imperial MSE-6 Mouse Droid got a graffiti makeover from Sabine Wren? The answer is an open-source, fully autonomous, 3D-printed droid that gave up its Imperial duties for a life of screaming, partying, and navigating on its own.

For the uninitiated, the MSE-6 Mouse Droid is the small wheeled robot that appears in the original Star Wars film, scuttling around the Death Star like a toaster on wheels. Sabine Wren, from Star Wars Rebels, is a prolific graffiti artist. Cass, who is Canadian and builds under the Chaos Theory name, is a fan of both eras of the franchise. She decided the droid needed a Sabine-style paint job and a party button.

It wasn’t enough to just build a new shell around an existing vehicle. Cass wanted the droid to navigate fully autonomously, react with a panic mode, and have a party button. Since the required parts aren’t typically found on a stock car, she decided to build the whole thing from scratch.

A Custom Chassis, Not a Shell Swap

The build’s foundation is a custom chassis that Cass designed and 3D-printed. She did use an existing flat metal Mecanum chassis underneath as a structural mounting point for the motors, but everything else is her own design.

Cass explained:

It is largely a custom chassis that I designed and 3D printed, although I did use an existing flat metal Mecanum chassis underneath it purely as a structural mounting point for the motors. It gave me something sturdy for the motors to screw into while I was developing the rest of the chassis. If I were to build a version 2, I would probably eliminate the Mecanum support entirely and mount the motors directly using brackets attached with heat-set inserts.

Cass said this was her first time using heat-set inserts to attach components to 3D prints, and she was pleased with how well they worked. She also admitted a less practical reason for building from scratch: she simply enjoys pushing her skills and building things that way.

Electronics and Party Mode

The droid’s brain is an Arduino UNO, with a DFPlayer Mini MP3 module handling audio. An ultrasonic distance sensor gives it a sense of its surroundings, so it can avoid obstacles and move on its own. The Hackaday.io project page lists the supporting parts, including an 8GB microSD card, 16 small 5x2mm magnets, and an 8-ohm speaker — 19 components in total.

That hardware makes the droid a far cry from its Imperial origins. Instead of rolling around delivering messages, it can detect obstacles, scream, and party when the button is pressed. The project description on Hackaday.io calls it “a self-driving, screaming, partying mouse droid.”

Open Source and Ready to Print

One of the biggest benefits of Cass’s from-scratch approach is replicability. Because the design doesn’t rely on a specific commercial RC car or an existing platform, other makers can print the parts and assemble their own version without hunting down a donor vehicle.

Cass added:

There is also a nice practical benefit to designing everything myself: it makes the project much more replicable. Someone else with a 3D printer can take the files and build their own version without having to track down a particular RC car or adapt an existing platform to fit.

She also said that, honestly, she just really enjoys building things from scratch and pushing her skills wherever she can. The full project is published as open source, with step-by-step instructions available on Instructables and the component list and project details posted on Hackaday.io.

Back in the Axial lineup and wearing a Jeep badge: the Cherokee XJ has returned to the SCX10 III platform. Axial’s new 1/10-scale SCX10 III Jeep Cherokee XJ 4X4 RTR is a ready-to-run brushed rock crawler, and RC Driver’s first look at the model frames the return as an improvement over everything that came before.

The Licensed XJ Body

Product copy for the model stresses that this is not a generic SUV shell dropped onto a chassis; it is a licensed execution with exact proportions and real body lines. The body is an officially licensed second-generation Jeep Cherokee XJ, offered in factory-correct Forest Green Pearl and Stone White. The durable polycarbonate body arrives painted and assembled, riding on licensed BFGoodrich Krawler T/A KX tires and licensed KMC KM444 MESA wheels. Up front, Axial fits a licensed WARN EVO10-S non-functional scale winch, a DirtBound front bumper, and a machined aluminum Factor 55 Hawse Fairlead. The DirtBound part comes from a partnership between Axial and DirtBound Offroad.

The full-size Cherokee XJ ran from 1984 to 2001 and is described in Axial’s materials as the first compact SUV to use a unibody design while still delivering real trail capability. Its lightweight construction made it nimble where heavier rigs felt sluggish, and its short wheelbase helped it pivot through rocky terrain. That character is what the scale model is meant to capture.

SCX10 III Hardware

Underneath, the SCX10 III build starts with a one-piece steel C-channel chassis and AR45 straight axles. The axles mirror what is found under most full-size off-road vehicles, and Axial says the LCXU transmission layout makes it easy to switch from standard axles to portals if desired. Suspension uses 6mm stainless steel links, all-metal pivot balls, and oil-filled shocks with aluminum threaded bodies and single coilover springs. An adjustable metal Panhard mount can be moved forward or backward to suit either a portal or straight axle setup.

The drivetrain centers on the LCXU DIG transmission, which has all-metal internal gears and full ball bearings. The DIG function locks the rear wheels for tighter turns in tight terrain, operated through the third channel of the included Spektrum SLT3 transmitter. Gearing combines two 48-pitch metal gears, a 48-pitch metal compound gear, and a 56-tooth composite spur gear; portal axle owners can swap the compound and idler gears to tailor performance. Power comes from an Axial Slick Rock 35-turn 540-size brushed motor and a Spektrum Firma 40A waterproof brushed ESC. Steering uses a Spektrum S683 servo with a steel output gear and standard 25T output spline, and the servo is rated for 7.4V high-voltage input. Bright LED lighting is built in, with white headlights, yellow running lights, and detailed rear taillights.

Box contents include the ready-to-run crawler with the Spektrum SLT3 transmitter, an SR515 receiver, the Firma 40A ESC, the Slick Rock 35-turn motor, the S683 steering servo, an SX108PM DIG micro servo, four AA batteries, and a product manual. Buyers still need a battery and charger: Horizon Hobby specifies an 11.1V 3400mAh 3S 50C Smart G2 Trail Pro LiPo battery with IC3 connector and an S155 55W AC G2 Smart charger. Axial also notes the model is compatible with shorty battery packs.

According to the product description, the crawler is aimed at experienced enthusiasts, garage tinkerers who like to tune and upgrade, and Jeep loyalists who have never picked up an RC before.

Pre-Order Details

Horizon Hobby is listing the crawler as AXI-2037 and taking pre-orders now. The retailer says pre-orders will ship and be available everywhere on October 7, with a note to contact local hobby shops to confirm participation. As a limited-time pre-order offer, select boxes may include an exclusive, limited-edition SCX10 metal badge while supplies last.

JConcepts is bringing titanium hardware to the Team Associated RC10B7.1 race buggy kit. The new JConcepts Titanium Screw Sets give builders high-end fasteners that, the company says, are strong while also being incredibly light. They are offered in burnt blue and stealth black, and JConcepts expects the colored hardware to turn heads in the pits.

Upper and lower kits

The launch splits into upper and lower kits. The upper top hat screw sets are the 91-piece versions, and the lower screw sets are the 32-piece versions. Each version is available in either burnt blue or stealth black.

That gives builders four combinations:

• Upper top hat screw set, burnt blue — 91 pieces
• Upper top hat screw set, stealth black — 91 pieces
• Lower screw set, burnt blue — 32 pieces
• Lower screw set, stealth black — 32 pieces

The upper kits use the top hat screw style that gives the set its name; the lower kits are the separate 32-piece tier. JConcepts describes the screws as high-end hardware that is strong and incredibly light. The two finishes are for racers who want the hardware to get noticed in the pits as well as perform on the buggy.

JConcepts’ titanium thread

The new RC10B7.1 sets are not the only titanium items in JConcepts’ recent product rotation. The JConcepts blog has introduced individual Top Hat LP JHCS titanium screws, and its new-products feed lists Fin titanium turnbuckle sets for the Mugen MBX-8, plus a 3.5mm Fin titanium turnbuckle kit for the T7, SC7, T6.4, and SC6.4 platforms. JConcepts describes those turnbuckle sets as designed for style, durability, and performance. The Top Hat LP announcement also makes the case for the material, describing titanium as a racer’s best friend.

For the RC10B7.1, the titanium top hat screw sets follow the same logic: strong screws, lighter hardware, and a finish that JConcepts expects to get noticed in the pits.

Around the JConcepts feed

The same feed includes other recent releases: 13mm shock pistons from a BK design project, React carpet inserts, metric washer sets, a Schumacher Cat PB radial NMB bearing set, a 2.0-inch X-Bite 4WD front tire, and a racing team cartoon shirt. The X-Bite is described as a fresh pin tire option developed for outdoor racing, while the metric washer set is tied to small adjustments in competitive racing. A separate blog roundup shows new bodies for the Losi Micro B and T84, a Dragonator body for the Schumacher Cat PB, and single-cab truck bodies for a 2001 Chevy Silverado 1500 and a 1999 Ford F-250. Other listings include a 7-inch RC10 vintage flat wing and a Factory Team radial NMB bearing set for the RC10 and RC10T.

Race coverage on the same blog includes more than 260 entries at Coyote Hobbies’ JConcepts Stock Nationals, more than 210 entries at the 2026 RCMTC World Finals at RC Madness, and a 2026 ROAR 1/8th Off-Road Nationals team report hosted by Silver Dollar Raceway. A race team update from the second full weekend of August 2026 also appears on the blog.

Price

Pricing for the RC10B7.1 Titanium Screw Sets runs from $76 to $195 across the four versions. The upper sets bring 91 pieces, the lower sets bring 32, and both burnt blue and stealth black are available in each tier. The range is the announced figure from JConcepts.

JConcepts has a new clear polycarbonate body option for 1:10 off-road racers, and this one takes its styling cues from closed-wheel racing. The Striker shell is built for the R1 Wurks R1 R1B Mark 1 chassis, giving 2WD buggy owners a fresh LMP-inspired look.

LMP-Inspired Styling

JConcepts describes the Striker as inspired by the LMP, one of the fastest closed-wheel racing vehicles in the world. The body’s standout feature is a wrap-around cab with a sunglasses-style window treatment, a look Brian Kinwald used on some off-road race cars during the 2010s. JConcepts says it combined that influence with its own ideas to create the new pod-style cab.

Out back, a stabilizing fin rises toward the rear of the shell, a feature JConcepts says provides P2-style performance characteristics. Up front, that ramping element blends into a small roof scoop with a nod to the BJ4 Worlds Edition, described as a small finishing touch for the center section. The sidepods, meanwhile, are described as the simplest JConcepts has produced, with rolling shapes, radius edges, and variable blended heights that sit clear of chassis geometry and electronics.

The rear of the 2WD shell covers the spur gear shroud while making it look like part of the overall design. A slight recess in front of the windshield is meant to redirect airflow coming through the front shock tower and create more usable windshield surface. The package also includes JConcepts’ Carpet | Turf | Dirt wing in the popular 6.5-inch optimized width.

Fit and Finish

The Striker arrives untrimmed, so owners trim it before mounting. It is formed from clear polycarbonate with protective film and available in standard or lightweight thickness. JConcepts says the shell fits closely around the R1 R1B Mark 1 chassis, through the front shock tower, with precise cutlines for a tight fit.

Window masks and a detailed decal sheet are included. The body is formed at JConcepts’ headquarters in Groveland, Florida, and the company says the product is designed and packaged in the U.S.A. JConcepts also says its team builds and tests products, travels to support the brand, and gathers feedback from drivers.

Pricing and Availability

JConcepts lists two versions of the Striker for the R1 R1B Mark 1: part number 0757 and lightweight part number 0757L. Their UPC codes are 845937042613 and 845937042620, respectively. Both shells carry a $37.00 retail price and a $31.45 MAP price.

Companion F2 Shell

The Striker is part of a larger JConcepts release for the R1 R1B Mark 1. The company has also launched an F2 body for the same chassis, described as bringing the functionality of its IFMAR World Championship-winning F2 shell to the latest R1 Wurks platform.

The F2 adds extra rear windows, a louvered roof, a Finnisher V configuration, double-step sidepods, a broad rear mounting ledge, and built-in clearance for the spur gear guard. JConcepts says it keeps a tight profile that follows the chassis outline from front to back; the front section slides over the top deck and under the front shock tower for a clean fit. The company also says the F2’s forward cab placement and windshield angle help it handle dirt, sealed synthetic surfaces, carpet, and astroturf.

Like the Striker, the F2 comes with window masks and a decal sheet. It includes two 6.5-inch Carpet | Turf | Dirt wings. Standard and lightweight clear polycarbonate versions are offered as parts 0756 and 0756L, with the same $37.00 retail price and $31.45 MAP price.

JConcepts points customers toward reputable dealers and distributors and asks them to demand authentic product.

JConcepts has started shipping the Pro-Built Reactor Stage 2 Retro Monster Truck, a version of the company’s 1:10 retro monster truck that arrives fully assembled and set up by the JConcepts crew. JConcepts says the only items the owner still needs to supply are radio gear, a battery, and a charger.

A Turnkey Take on the WOLF Classic

The Pro-Built model is based on the Reactor Stage 2 “WOLF” Classic kit with a 10.75-inch wheelbase (part #9008). JConcepts has already handled the construction, so the usual build steps — mounting tires, installing electronics, trimming and fitting the body — are done before the box arrives.

The rolling package includes:

• A 1988 Chevy Silverado Monster Truck body (#0344) with custom paint, custom decals, custom trim, and fastback mounting
• Golden Years monster truck tires in gold compound (#3183)
• Tribute 2.6 x 3.6-inch monster truck wheels with adaptors in white (#3377)
• JConcepts Silent Speed 27T brushed competition motors (#9004)
• A Hobbywing QuicRun waterproof 1080 G2 brushed crawling ESC
• A mid-profile, high-torque, high-voltage metal-case servo
• Tire mounting, assembly, and gluing handled by JConcepts

Retro Roots

The Reactor platform is a competition-inspired 1:10 retro monster truck design from the JConcepts team in Groveland, Florida. It was built for retro-style racing and exhibition, including straight-line car crushing, U-turn courses, Chicago-style racing, and figure-8 track configurations.

JConcepts founder Jason Ruona has described the Reactor as a full-circle project tied to the roots of how he entered the hobby, combining off-road racing engineering with the appeal of building, decorating, and personalizing a model to look like the real thing.

During development, JConcepts planned the Reactor around three wheelbase configurations: the 10.75-inch carbon-fiber chassis used in the Pro-Built, a 13.00-inch racer setup, and a 9.75-inch short-wheelbase package offered as optional parts. The 10.75-inch length is the traditional choice, designed to accept a wide range of body shells and deliver predictable handling in tight turns, including 180-degree corners.

Reactive Drivetrain and Chassis Details

The REACTOR name comes from the kit’s gearbox stay and pivot assembly. The “reactive” pivot is designed to work with a range of suspension setups, including leaf springs and coil-over shocks. JConcepts also uses a motor-on-axle layout that places the motor low and positions it perpendicular to reduce chassis torque and twist under hard acceleration.

The gearbox combines metal, aluminum, and injection-molded gears and features a dual-pad slipper clutch that can be tuned differently front and rear. A bellcrank steering assembly with optional adjustable Ackerman is part of the truck, and the platform is designed around eight oil-filled shocks. The low-mounted chassis cradle is built around 2S “Shorty” LiPo packs for a relatively low center of gravity.

The motor plate accepts brushed and brushless motors, and JConcepts recommends the 27T brushed setup as a lower-cost electronics entry point that keeps the driver in control.

Builder’s Kit Still in the Lineup

The Pro-Built release builds on the existing #9008 WOLF Classic builder’s kit. That version is a sliding-chassis assembly project: the buyer gets the chassis and parts but must supply the body, tires, wheels, electronics, and other running gear. JConcepts lists the #9008 kit at a retail price of $645 with a MAP of $537.

A second wheelbase option, the Reactor Stage 2 “WOLF” Racer (#9009), is listed at $676 retail for builders who want the longer 13.00-inch chassis. JConcepts lists the Pro-Built truck at $975 under part number #9008-PB10.

Burnt blue is the newest color in JConcepts’ Fin titanium turnbuckle line for the Mugen MBX-8. After the initial launch in stealth black, the company is now offering the same five-piece set in blue.

JConcepts says the Fin series was designed for style, durability, and performance. The camber and steering links use a beefy 5mm square titanium base that tapers into a threaded section designed to accept the rod ends included in the MBX-8 kit. The link design includes a lengthened adjustment area and finned cuts that rotate around the center of each piece. A 3mm Fin titanium steering drag link is also included, so the steering hardware gets the same visual finish.

The turnbuckles are machined with both left- and right-hand threads, and the left side is marked for easy orientation. JConcepts emphasizes the lightweight nature of the parts and describes titanium as one of the most sought-after exotic materials in the world. Its product notes also call the blue and black sets aesthetic jewelry and highlight the high-grade machined titanium construction.

Fitment and part numbers

JConcepts lists the Fin turnbuckle set for the Mugen MBX-8 and the Mugen MBX-8 Eco, covering both the nitro buggy and the electric Eco version. The new burnt blue version is a five-piece kit with part number 2584-1 and UPC 845937019431. The original stealth black version remains available as part number 2584-2 with UPC 845937023995.

Both color options carry a retail price of $55.00 and a MAP price of $46.75. The blue and black sets share the same price, fitment, and five-piece layout.

JConcepts also sells its turnbuckle adjustment wrench separately as part number 2508.

Set contents

The five-piece configuration breaks down into camber links, steering links, and a separate 3mm steering drag link. The camber and steering links are made from the 5mm square titanium stock, while the drag link is the thinner 3mm Fin piece that completes the package. JConcepts uses a standardized thread base designed to fit existing rod ends, so owners can keep using the rod ends already featured in the Mugen kit. The marked left-hand thread is meant to make adjustment easier by removing guesswork about which direction to turn each buckle.

The blue release follows the black-only introduction noted by RC Car Action. The product listing identifies the two finishes as burnt blue and stealth black, both under the same Fin design. The new color gives MBX-8 and MBX-8 Eco owners a second factory finish option without changing the construction or hardware layout.

Earlier coverage from Big Squid RC called the black Fin hardware ultra-strong, incredibly light, and trick-looking. That outlet also highlighted other JConcepts Mugen-related products, including P2 and S15 bodies for the MBX8. The P2 body for the MBX8 features a large-format cab and multi-angle sidepod winglets, while the S15 body uses a cab-forward design with mid-body winglets. On its new-products blog, JConcepts has also been showing a range of recent releases, including bodies for the Losi Micro B, the T84, and the Schumacher Cat PB, plus tires and apparel.

Availability

JConcepts points interested buyers to JConcepts.net for more information. The blue set remains part 2584-1, and the black set remains part 2584-2. The matching turnbuckle adjustment wrench is still available separately as part 2508.

Kengfai is going double-deck with a new Scania S730 V8 diecast, and it’s bringing two motorsport-inspired liveries along for the ride. The model will be offered in the Subaru WRC Service Team Blue livery and the Le Mans Centenary livery. Each version is priced at about $75 US, with delivery scheduled for late October 2026. With this release, Kengfai is adding its name to the double-deck truck format.

At a glance:

• Two liveries: Subaru WRC Service Team Blue and Le Mans Centenary
• Approximate price: $75 US per model
• Delivery: late October 2026
• Product number: TBD

Two distinct looks

The Subaru WRC Service Team Blue option gives rally fans a familiar competition look, while the Le Mans Centenary livery brings an endurance-racing vibe to the heavy truck. Both are double-deck configurations, a body style that has become a talking point in diecast truck circles.

Kengfai hasn’t released a product number for either version, and the main announced details are the shared price point and the delivery window. Collectors who want one of each will need about $150 total, based on the stated approximate per-model price.

Kengfai’s growing collector profile

The Scania announcement is another step for a brand that has been quietly gaining traction among car model collectors. Kengfai is still relatively low-key compared with some of the biggest names in diecast, but it has built a following with classic models and modern luxury cars. The Rolls-Royce it currently makes is particularly popular, and its sub-brands and releases are also finding buyers in the market.

That background helps explain why this Scania S730 V8 is worth watching. Kengfai has tended to focus on re-creating iconic road cars, and a heavy truck with a V8 engine and a double-deck body is a different kind of project for the company.

Why Scania diecasts resonate

Scania holds a special place in the diecast truck market. The craftsmanship in Scania models mirrors the attention to detail of the full-size trucks, from accurate scaling to finely detailed interiors, which is why collectors often describe them as miniature masterpieces. Brand loyalty plays a big part too: many truck enthusiasts see Scania as the pinnacle of truck manufacturing, and owning a scale version is a way to celebrate and honor that favorite brand.

There’s a collector-market angle as well. Limited editions and rare models have a history of appreciating over time, so a distinctive release like this can carry both emotional and financial appeal. That’s not a guarantee for this particular model, but it’s part of why Scania diecasts stay in demand. Many collectors also like to build complete series around one brand or theme, and a double-deck S730 V8 gives them a fresh piece to slot into that kind of collection.

Scania diecasts are a long-running category in the online hobby market, with retailers and marketplaces devoting dedicated sections to the brand. Descriptions of these models often point to the level of detail and the brand loyalty that truck enthusiasts bring to collecting. A new Kengfai double-deck S730 V8 gives that category a fresh release to watch.

Delivery timing

Both liveries are expected to ship in late October 2026. With a per-model price of roughly $75 and two color options, Kengfai is giving truck collectors a straightforward choice: pick the Subaru WRC Service Team Blue, go with the Le Mans Centenary, or grab both while the double-deck wave continues.

A new kind of Reedy Power product

Reedy Power has spent years building a name in RC racing, but its newest release is about a more everyday task: keeping a mobile device charged. The company has introduced the Reedy Power Magnetic Power Bank, now shipping in white and black. Reedy’s launch material prices each version at $19.99.

The white model is #97243 and the black model is #97244. Both versions share the same 10,000mAh capacity. Reedy says the bank can charge a mobile device using the magnetic dock or through a USB-C cable. The bank itself is recharged through a USB-C input on the side of the unit.

One purchasing detail stands out in the announcement: the charging cable and power supply used to recharge the bank are not included. The product ships as the bank itself, so the user needs to supply a USB-C cable and a compatible power source to recharge it.

Racing pedigree is the hook

Reedy’s announcement opens by leaning on its competition background. The company says its championship pedigree doesn’t apply only to competition-level RC cars; now it is here to enhance mobile devices. The note lists the racing record first, then the product details.

The launch message makes the connection even stronger:

Charge your mobile device using the same brand that’s won 30 IFMAR World Championships. Reedy Power will keep your mobile device up and running, regardless of your location!

That quote puts the 30 IFMAR World Championships total at the center of the product pitch. The phrase championship pedigree in the announcement reinforces the link before the specs are listed. The launch connects the product directly to that record instead of treating it as a standalone item.

Early coverage

The launch was picked up by RC hobby outlets almost immediately. Big Squid RC published a post saying the product is now shipping and pointing out that it can be useful at the track, out on a trail, or during a bashing session. RC Car Action also published the announcement, carrying Reedy’s full product note, the part numbers, and the price.

Both outlets list the same two part numbers: #97243 for white and #97244 for black. Both describe the 10,000mAh capacity and the two charging paths for a mobile device. RC Car Action’s version specifically includes Reedy’s note that the charging cable and power supply are not included.

The two coverage angles are slightly different. Big Squid RC keeps its post short and treats the bank as a useful track-side accessory. RC Car Action’s story is built around Reedy’s original text and includes the claim that the bank can keep a device up and running regardless of location. Both versions agree on the basics: 10,000mAh, white and black, magnetic dock, USB-C cable, and USB-C recharge input.

The two SKUs are the main variants at launch. White and black are priced the same and have the same capacity. The buyer chooses a color first, then picks between the magnetic dock and a USB-C cable when charging a device.

Where to get more information

The Magnetic Power Bank is shipping now. Reedy directs customers to www.reedypower.com for more information and also says they can contact a local hobby shop. The announcement references AssociatedElectrics.com/Reedy as another place to find product details.

The launch can be summed up in a few facts from the announcement: two colors, one $19.99 price, 10,000mAh of capacity, two ways to charge a device, and one USB-C input for recharging the bank. The power bank is shipping now, and the rollout carries Reedy’s 30-title IFMAR history with it.

Small Parts, Big Setup Impact

Millimeter-level tuning is part of competitive RC racing, and JConcepts has just expanded one of its long-running accessory kits with a new finish. The metric washer set for 1:10 scale vehicles, originally offered only in blue when it debuted in 2013, is now available in black anodizing.

The company’s announcement puts the focus squarely on small adjustments:

“Small adjustments matter when it comes to competitive racing.” — JConcepts

JConcepts says the washers are “perfect for roll-center adjustments on 1:10th scale vehicles” and “extremely handy for shimming suspension components or common wheelbase adjustments.” Each package includes 16 pieces total, with four washers in each of four thicknesses:

• 0.5mm
• 1mm
• 2mm
• 3mm

All washers are made from aluminum and can be had in blue or black anodizing. JConcepts says the large diameter gives the washers a healthy footing against components, which is meant to ensure consistency and a sturdy base. The company lists the set as “fits – all purpose” and sums up the kit as offering “multiple thickness, maximum adjustability.”

Pricing and Part Numbers

Both finishes carry the same retail price: $11.00, with a MAP price of $9.35. The blue set is part #2237-1 with UPC 845937009487; the black set is part #2237-2 with UPC 845937041203.

The blue version has been around for more than a decade, according to RC Car Action. When the set first appeared in 2013, it was only available in blue. The new black SKU gives racers a second finish option with exactly the same 16-piece configuration.

JConcepts Background

JConcepts, founded in 2003, designs and manufactures RC tires, wheels, bodies, and accessory parts. Its homepage says the company builds RC tires and wheels, RC bodies, and RC parts “to take your RC monster truck, buggy, scale crawler and more to the highest level!” The company’s website also describes its work as “World Proven Innovation and Design.” Its catalog includes products such as 4-Ribber 2.0-inch front tires, Fuzz Bite LP 2.2 rear tires, Rock Scorpion 1.9-inch tires, Mono 2.0-inch rear wheels, the Dragonator B84 body, and an RC10 1989 Stealth battery box and electronic tray made with 3D printing. The company also hosts a YouTube channel, JConceptsLive, with build-related videos such as the REACTOR – Retro RC Monster Truck behind-the-build piece.

1:10 Scale Roots

The 1:10 scale segment is close to the company’s history. On its blog, JConcepts called outdoor 1/10th scale racing “a segment of racing that is near and dear to the JConcepts crew,” and it pointed to events like the Winter Champs at Lake Park in the 1990s. The blog also cited recent events — the Hobby Haven Shootout, the Memorial Salute, and the Dad’s Series — as inspiration for its tire guide.

In that guide, JConcepts breaks down its outdoor 1/10th scale tire options by grip level: the Double Dees V2 for low-grip conditions, the Sprinter for medium grip, the Rehab for higher grip, and the Ellipse for high-grip, minimal-dust tracks. While indoor clay, carpet, and turf have grown in popularity, the company says it still has a soft spot for outdoor tracks.

A Second Finish for Setup Kits

The washer set is a smaller piece of that same tuning-focused lineup. With black now joining blue, racers can get the same 16-piece kit, the same four thicknesses, and the same $11.00 retail price in a second color. The black set is listed under part #2237-2 with UPC 845937041203.

JConcepts has introduced a 28-piece Radial NMB bearing set for Schumacher Cat PB Mod and Dirt Spec vehicles. The announcement arrived on September 23, 2026, and the new part is listed under number 5318 with UPC code 845937039996.

The company stresses that free-rolling bearings matter every time a car hits the track. In the release, JConcepts says bearings need to be quality, precise, and durable enough for national- and world-class racing demands. The Radial kits are built around NMB-quality bearings, stainless steel construction, and precise tolerances. JConcepts adds that each set is packed with care and backed by racing heritage, customer support, and RC dedication.

What the set includes

The new 28-piece set is made for Schumacher Cat PB Mod or Dirt Spec cars. It uses the JConcepts part number 5318 and the UPC code 845937039996. Retail price is $85.00, and the minimum advertised price is $72.25.

According to JConcepts, the radial bearing program is offered in many set configurations to suit different kit requirements, so the Cat PB-specific kit joins a larger family of bearing options. The same construction details — NMB quality, stainless steel, precise tolerances — carry across those kits.

More from the JConcepts product page

The new set is not the company’s only recent Cat PB-related release. The JConcepts New Products page has also highlighted Cat PB bodies, including the Dragonator, Striker, and S15LP. The blog describes the Dragonator as heavily inspired by early-2000s dynamo styling, and it links the S15LP to the IFMAR World Championships, which it calls “the pinnacle of RC racing and a perfect setting for product releases and performance.”

Other recent entries include the P2 body for the Losi Micro B and a P2 T84 body. The page also covers a 2001 Chevy Silverado 1500 single-cab MT body and a 1999 Ford F-250 single-cab MT body. Also listed are an RC10/RC10T Factory Team Radial NMB bearing set, a Striker T-shirt, and X-Bite 2.0-inch tires.

The official homepage also features current products such as a 4-Ribber 2.0-inch front tire at $17.25, a Fuzz Bite LP 2.2 rear tire at $18.75, and a Dragonator B84 body at $31.45. Also listed are Rock Scorpions 1.9-inch tires at $27.75, a Mono RC10 2.0-inch rear wheel at $11.05, and an RC10 1989 Stealth battery box and electronic tray 3D print at $35.70. The site also points to a REACTOR retro RC monster truck “Behind the Build” video on its YouTube channel, which is listed as JConceptsLive.

JConcepts’ official website identifies the company as a designer and manufacturer of RC tires and wheels, RC bodies, and RC parts for monster trucks, buggies, scale crawlers, and other vehicles. The company says it was established in 2003 and describes its work as “truly World Proven Innovation and Design.”

Price and availability

The Cat PB Mod/Dirt Spec Radial NMB bearing set is listed at $85.00 retail with a $72.25 minimum advertised price. The product number is 5318, and the UPC code is 845937039996. JConcepts says the set fits the Schumacher Cat PB Mod or Dirt Spec, and the company’s official website is the place for more information. The set is listed in the same New Products category JConcepts uses for its recent body, tire, and accessory announcements. RC Car Action carried the announcement on September 23, 2026.