TC-Motor 8mm Blue Chain Roller Tensioner For Dirt Pit Bike SSR Thumpstar TTR CRF50 CRF70 SDG DHZ YCF Stomp XR50 Atomik Coolster Fits:8mm Blue Rubber Chain Roller For Many Chinese Pit Dirt Bike Motorcycle From 50cc-250cc. Guaranteed Good Quality,Made From the Highest Quality Materials Available Always Responsible Customer Service Product Shipped From China Arrival Within 7-15 Business Days