IRD Crankarms (ONLY) Polaris Direct Mount with BB
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Cold-forged aluminum crank arms with BSA threaded external bottom bracket. Chainring not included
– SRAM 3-bolt direct mount chainring interface
– 24mm OD axle (Shimano Hollowtech 2 MTB standard, fits 68 and 73mm BB shells), CrMo
– Included BSA threaded bottom bracket and Torx 20 chainring bolts
– Finish: Polished anodized silver or black
– Weight: 590g (not including BB)
– Q-factor: 163.5mm
– Chainlines with 1x chainring:
- 3mm offset ring: 48.5mm (similar to GRX 1x)
- 6mm offset ring: 45.5mm
- 0mm offset ring: 51.3mm