Middleburn Middle Chainring with Slick-Shift & Hardcoat Slickshift chainrings: Stainless steel pick-up pins & machined shifting aids on the middle & outer rings provide the smoothest changes possible on 8 & 9 speed systems, even under power! Hardcoat chainrings: A special ceramic/PTFE coating is applied to the rings in place of the regular anodised finish. This has two benefits
- 10 times less friction & 4 times the wear resistance of a standard ring. Only compatible with the Hollowtech II chainsets The 88ID is the diameter of the shoulder on the spider that the chainring sits on to. 104pcd Buy Middleburn Middle Chainrings from Chain Reaction Cycles, the worlds largest online bicycle store.