The Engineered ring, CNC cut from 7075-T6 aluminium. Modified shifter gates & special profiles to allow 9/10 speed chains to shift hassle free. The middle ring is cut from thicker 0.190 plate to prevent the chain from falling between the granny & middle ring.
Blackspire Super Pro Middle Ramped Chainring Specifications:
Stainless steel pins for better shifting
9/10 speed compatible
Buy Blackspire Super Pro Middle Ramped Chainrings from Chain Reaction Cycles, the world's largest online bicycle store.