Borrowing its design from REX1, the forged and CNC'd REX 2 cranks are enhanced by proprietary Trinity Drilling System (TDS) triple drilling technology to yield the perfect weight-to-stiffness ratio. We wanted to craft a mountain bike crank that could respond to whatever demands you throw at it. The REX 2.1 uses ROTOR’s UBB30 technology, offering a performance upgrade opportunity for almost all mountain bikes on the market – whether they were designed for 30mm cranks or not.
172.5mm length 521g
- Spider: 76 BCD | 110/60BCD
- Spindle: 30mm aluminum alloy
- Q-Factor: 163 mm
- Chainline: 44.5mm
- Material: forged and machined 7075 aluminum alloy
- Compatibility: Bottom Bracket BSA, BB89, BB92, BB30, PF30, BBRight, Cannondale F-Si Ai (spider sold separately), Oval and round chainrings, 76 BCD, 9,10 and 11 speed