BSD Substance XL V2 CranksWith only a single bolt for installation, coupled with a new invest cast that creates a smooth, ankle friendly join, the BSD Substance XL V2 cranks are not only notoriously strong, but very rider friendly! The BSD Substance XL V2 cranks even come with a BSD Mid 24mm BB, so you can install your cranks with fresh bearings for an even smoother feel. FEATURES 165mm 170mm 175mm RHD LHD compatible Single bolt design 2. 5 piece cranks Heat treated 4130