The Raceface Race 4-bolt chainrings are incredibly stiff and significantly lighter than previous RaceFace triple ring setups but are still affordably priced. The RaceFace Race 4-bolt chainring has been CNC machined in their BC manufacturing facility, the outer, middle and aluminium inner rings are manufactured from 7075-T6, one of the strongest alloys available today, to create a durable and reliable chainring that allows for precise shifting. Features These rings are incredibly stiff and significantly lighter than previous Race Face triple ring setups Outer rings are made from 4mm thick material & middle rings from 5mm thick material for unsurpassed durability Rings feature RaceFace's patented S.H.I.F.T. technology, featuring hard wearing stainless steel S.H.I.F.T. chips for dual action up-shifts CNC Machined 7075 Aluminum