the SMC adds a thicker layer of Orthopedic Comfort Foam coupled with a men's specific pressure relief channel

Spank Spike Boost Rear Hub:

Frames with a 41mm ID for the Bottom Bracket 89

Test results

Shimano Deore FC-M6100 1x12 Speed Crank Arms - 24mm - Shimano Direct Mount - 52mm Chainline - Black - 175mm - 68-73mm - 32T Back in Stock the SMC adds a thickerThe Shimano Deore FC M6100 1x12 Speed Cranks feature a new construction and have inherited the direct mount system from Shimano's flagship models. Chain retention is greatly improved thanks to the Dynamic Chain Engagement tooth profile and the 172mm Q factor and 52mm chainline is compatible with both 142mm or 148mm rear hub spacing. Who's this item for: These cranks are a great choice for any type of rider looking for an up to date and aesthetically