Black CNC Aluminum REAR AXLE BLOCKS CHAIN ADJUSTER BOLTS for Sur-Ron Ultra Bee M
For Sur Ron Ultra Bee， Axle Block Chain Adjuster Bolts. For Sur Ron Ultra Bee 2023+. 2 X Axle Block Chain Adjuster Bolts。. Function: Turn the adjusting bolt. Move the axle block forward or backward to adjust the sprocket tension.