The 100mm bottom bracket compatible Next SL Fat Bike Crankset uses hollow carbon arms and a direct mount ring to boast a ridiculously low weight. And, Race Face uses carbon and aluminum sourced from the United States and manufacturing resources in its Canadian facility to produce industry leading quality. The arms are hollow, with no internal structure left over from the manufacturing process. This means the lowest weight possible, and incredible strength. But that's only one aspect to these cranks that makes them Race Face's top offering. A direct mount chainring is not a new concept, but Race Face's Cinch execution ends up making the Next SL Fat Bike one of the most versatile cranksets available. For easy maintenance, the proprietary Cinch spline uses a standard Park BBT 22 bottom bracket tool for installation. The splined design eliminates the weakness of four bolt interfaces, and its 7075 T6, 4mm thick, aerospace grade aluminum transfers pedal loads without flexing. Race Face provides replacement rings in sizes 26 through 36t, but the cranks are only available with 28 through 34t options. The chainrings work with 9 , 10 , and 11 speed drivetrains, and the rings feature the narrowwide profile. This design helps to retain the chain by preventing jump, which is due to a tighter interface between inner and outer links. The Race Face Next SL Fat Bike Crankset has a raw carbon finish and comes in a 175mm length, and either standard rear spacing or 190mm.