This ultra stiff chainring is made of 4mm plate 7075-T6 aerospace grade aluminium giving it the strength to transfer loads without flexing. Built to withstand the rigours of DH riding these are still light enough for XC/Trail/All Mountain use. With Narrow wide technology the new chain rings will that helps the profile keep your chain retention. Compatible with drive trains from 10 to 12 speed and Race Face's Cinch system makes for a great stiff chainring that will hold the chain tight and help you conquer the next mountain.Perfect Hold. This chainring has an alternating narrow-wide teeth configuration for unbeatable chain retention no matter how bumpy things get on trail. Torque it Real Good. Manufactured from forged 7075-T6 alloy this tough chainring can stand up to anything your jacked quads can throw at them. Power To The Pedal.