Front Sprocket 15T

15-tooth front sprocket for Rush SR chain drive system. This is the factory default front sprocket that works with the 44-tooth rear sprocket to provide the standard final drive ratio.

The front sprocket mounts to the transmission output shaft and drives the RK GXW 530 chain. Changing the front sprocket tooth count adjusts the final drive ratio—fewer teeth provide more acceleration and less top speed, while more teeth provide less acceleration and more top speed.

The front sprocket can be changed with a 32mm socket. This allows drivers to adjust gearing for different track configurations without changing the rear sprocket.

This is an OEM replacement part. The Rush SR uses adjustable final drive ratios to suit different track configurations.