Superb cranks from the best selling Shimano MTB groupset.Characteristics: Hollowtech II crank arms offer unrivalled strength to weight ratio SG-X chainrings offer a precise gear shift and are compatible with HyperGlide Chains and cassettes. Rigidity and hardness increased with an advanced design due to more separated bearings and wide axis 9 speed chainrings with ratio 44/32/22 Supplied with bottom bracket bearings suitable for shell sizes 68 and 73mm Weight: 853 gr for the M770 in 175mm
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