Middleburn Middle Hardcoat Chainring 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. Available only in certain sizes. Can be combined with Slickshift machining too. Buy Middleburn Middle Hardcoat Chainrings from Chain Reaction Cycles, the worlds largest online bicycle store.