Profile Flush Bolts Large (for hollow cr-mo spindle) Profile 19mm Cranks The BSD Substance Cranks are

The BSD Substance Cranks are both RHD and LHD compatible and now come with a free installation tool

The tension system is away from the grind side

a main and a secondary waterproof jacket and an outer K-Shield mesh housing for reduced weight

The Nightshift also features hollow dropouts to keep the backend strong yet lightweight

The 121 half link chain is heat-treated and is engraved with the Primo logo

Profile Flush Bolts Large (for hollow cr-mo spindle) Profile 19mm Cranks The BSD Substance Cranks areReplacement Profile Flush bolts and matching washers for Profile and Madera Cranks. Made in the USA. Available in regular size for standard cr mo axles and titanium axles or larger diameter size for the new hollow cr mo Profile spindle. ###section### Product Specs Rise: N A Bar Clamping Diameter: Multi Bar Clamping Diameter: TBC