The Substance XL crank features heat treated 4130 chromoly arms with a rectangular cross section for increased stiffness and grindability.
The 24mm diameter spindle is stiffer and stronger but being hollow, does not add any extra weight to the cranks.
The new flush boss design eliminates sharp edges around the ankles.
BSD PCP BAR ENDS
BSD BARRIER GUARD SPROCKET
BSD DONNASQUEEK TIRE
BSD SUBSTANCE BB KIT (all sizes!)