Chromag Sequence Cinch BOOST ChainringAll set for intense MTB rides, this chainring gives you brilliant torque on the roughest of trail conditions. It uses the official X-SYNC technology licensed from SRAM for unmatched chain retention and control as you blast across the mountain. This means that you'll have peace of mind that your chain will stay put when riding across rock gardens, tree roots and debris at speed. Features: Use: MTB Spacing: BOOST Mount: Cinch Technology: X-SYNCBuy Chromag Components from Chain Reaction Cycles, the World's Largest Online Bike Store.