T.M. Designworks PowerLip Chain Roller Kit - Black - ZDK-YZM-BK

The Powerlip chain roller is the only specific-fit chain roller on the market
Each roller is engineered and molded from a low-friction custom plastic material
The roller size and Powerlip offset are race-tested to improve drive chain power and reduce chain plate wear
The sealed bearings are ABEC-certified, with special racing grease
Kit with two rollers (for upper and lower mounting locations) comes with replacement bolts, nuts and shimming washers (where applicable)