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The ALDHU incorporates OCP Mount technology, which enables the rider to fine-tune the orientation of ROTOR’s oval Q RINGS. The ALDHU® proprietary, patent-pending design is based on the modularity of each crankset component. Weight: 347,8 g (175mm w/o chainrings&axle) Sizes: 150/155/160/165/167.5/170/172.5/175 Q-Factor: 148 mm / 153 mm Chainline: 43.5 mm / 46 mm Material: 7055 aluminium Compatibility: BSA30 , ITA30 , BB30 bearing kit, PRESS FIT 4630, UBB4630, BB386 , PRESS FIT 4130