Description
RF85-treated birdcage bearing for the D1 JRX junior sprint, from Superior Bearing.
The RF85 treatment lowers the bearing’s rolling drag, which is free speed on a junior sprint where every bit of drivetrain friction shows up on the stopwatch. Best used with DayLube NanoCeramic racing grease. Fits the JRX birdcages; sold individually.
In stock in Fresno, CA. 559.891.1901.
![JR Sprint Rear Axle [Complete Assembly (JRX)]](https://d1driven.com/wp-content/uploads/2016/06/JRX-500-050K_1-500x500.jpg)