* Tooth pattern designed specifically to work with the Shimano 12 speed hyperglide chain * CNC machined in-house in the UK from 7075 T6 aluminium, anodised* Learning from years of experience our tooth pattern has been optimised to increase longevity and performance in poor conditions * Designed to work with 12 speed Shimano chains * Uses our same tried and tested tooth profile as our standard Narrow/Wide chainrings reviewed 10/10 by MBR