Wolf Tooth Components Bash Guard: for 104 BCD Cranks, fits 26T - 30T Chainrings Use 8mm chainring bolts if mounting your chainring in the middle position, utilize 6mm bolts if utilizing a 64 BCD ring If utilizing a 30T Wolf Tooth ring, use 10mm length bolts with the head of the bolt on the inside to provide clearance for the chain Only fits cranksets with an outside "big ring" mounting position - they do not fit cranks without a dedicated flat surface for an outside ring Max Tooth: 30 Defined Color: Black