Description PROMAX C-1 chain tensioners are designed for wheels with 10mm axle and for classic frame dropouts. They prevent derailment during your acceleration during BMX races. The 2 fixing holes and the tension adjustment by screw allow you an even more precise adjustment of the chain tension thanks to the control marks. FEATURES : • CNC machined 6061-T6 aluminum • Axle: 10mm • 2 fixing holes • Adjustment by a single screw with lock nut • Weight: 64g • Sold in pairs COMPATIBILITY: • All classic frames with open rear dropouts
