BoxThree chain tensioners are designed for 10mm axle wheels and classic frame dropouts.
They prevent derailment during acceleration in BMX races.
The tension adjustment screw allows you to precisely adjust the chain tension with the control markings.
Details
- Forged 6061-T6 aluminum.
- Axle: 10 mm.
- 1 fixing hole.
- 20 mm of adjustment.
- Adjustment by one screw with lock nut.
- Sold in pairs.
- Compatibility : All classic frames with open back legs.
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