T-Cycle Single Sided Bolt On Chain Keeper 28mm long for 15t/8mm Idler brand_crank brothers Provides a perfect attachment point

Provides a perfect attachment point for a computer

GT II Series and Magnum models

Precision sized to fit the three most popular spoke nipple sizes on the market

Clamps sold separately

Using a steel cone ring on aluminum frame material gives you better friction and less chance of the gear unit slipping in the frame

T-Cycle Single Sided Bolt On Chain Keeper 28mm long for 15t/8mm Idler brand_crank brothers Provides a perfect attachment pointThe Stainless Steel Single Chain Keeper holds your chain in place on a Return or Power idler in an economical, durable and beautiful manner befitting the T Cycle brand. This chain keeper isn't just a piece of bent metal, like you'll find elsewhere. The tough, abrasion resistant, quiet if rubbed nylon keeper arm is fully supported over its entire length by a 5mm stainless bolt, making it the toughest chain keeper in the business and the easiest to fix