These little gadgets fill the void between axle and dropout. Works with any frame, chain and chainring combo. Made of 6061 T6. 3/8” x 25mm O.D., 14mm x 30mm O.D.. Sold in Pairs.

• Solid, non-adjustable chain tensioners compatible with any frame, chain and chainring combination
• Sold in pairs for 3/8" or 14mm axles in various offset sizes
• Sturdy and dependable 6061-T6 alloy construction