Every gram counts in competitive RC racing, and J&T Bearing Company has a new upgrade for Team Associated’s AE 7 Series that targets one of the most critical rotating masses on the car.
The J&T Lightweight Titanium AE RC10B7.1 Slipper Screw is machined from 6Al-4V titanium, a material known for its strength-to-weight ratio. The company says the screw is designed to reduce weight and provide quicker acceleration, and it’s a quick and easy way to lower rotating weight, lower the center of gravity, and ultimately lower lap times.
Specs and Pricing
The screw features a broached 2mm hex head, making it easy to adjust the slipper clutch even with the motor fan installed. Each purchase includes one lightweight titanium slipper screw. The part is priced at $13.99 and is available through ProMotionRC.com, the official J&T Bearing distributor.
How It Compares to Other Titanium Options
J&T Bearing isn’t the only company offering a titanium slipper screw for Team Associated’s B7-series cars. Several aftermarket brands have jumped into the same gap with similar products, giving racers a range of choices.
Avid RC sells a B7 Titanium Slipper Screw V2 that it calls “one of the world’s lightest,” weighing in at just 1.22 grams. That’s a 69% reduction compared to the kit’s steel screw, which weighs 3.95 grams. Avid’s version is also made from billet 6Al-4V titanium and uses a 2mm hex head. It is listed as an upgrade part for ASC92448 and ASC92449 and fits the B7.
Exotek Racing offers a B7.1 Top Shaft Screw (part number 2225) that weighs about 2 grams — roughly half the weight of the stock screw. Exotek’s screw is polished titanium and allows counter-holding with a 2mm hex driver on the slipper side for precise tuning. It fits the stock laydown top shaft and slipper of the B7 series without modification, and is suitable for the Team Associated RC10B7.1 and B7.1D.
Performance Claims
All three products share the same fundamental goal: reducing rotating mass inside the transmission. A lighter slipper screw means the motor has to spin up less inertia, which can translate into snappier acceleration and a lower center of gravity. Exotek claims its screw results in “noticeably more agile acceleration and reduced load on the motor.” Avid RC emphasizes the weight savings and easier slipper adjustment. J&T Bearing points to quicker acceleration and lower lap times.
Availability
The J&T Bearing Titanium Slipper Screw is available now for $13.99 through ProMotionRC.com. Avid RC’s B7 Titanium Slipper Screw V2 and Exotek’s B7.1 Top Shaft Screw are also widely available through their respective distributors and retailers.
For racers looking to shave a few grams off the drivetrain and improve throttle response, any of these titanium screws provide a straightforward, drop-in upgrade for the AE 7 Series.









