Adjusting chain tension is quick and easy with the new Box Three™ Chain Tensioner. With a single-hole "lollipop" design, these tensioners reduce weight and help keep your rear wheel locked in place.

Features:
- New and Improved
- 20mm of Adjustment
- Single Axle Position
- Slotted for Dropout
- ED Black Hardware
- Anodized Finish

Specs:
- Axle Size 10mm (3/8") only
- Material 6061-T6 Aluminum
- Hardware
- Stainless Steel