Blackspire snaggletooth cinch oval boost chainringenjoy a smooth and reliable performance no matter what your riding discipline from the oval boost chainring from blackspire. Benefiting from an optimised tooth profile and a constant torque for exception traction that prevents stalls and spinouts, this is the ideal component to your bike. Lightweight and durable oval chainringthis brilliant model is constructed from a cnc machined 7075 t 6 aluminium for low weight and durability as you soar around the mountain. This oval shaped version is specifically designed to be used with any cranks which feature a raceface cinch interface. When working in tandem with modern clutch derailleurs, the possibility of chain drops is eradicated which makes for a strong and confidence inspiring experience.featuresmaterial cnc machined 7075 t6 aluminiumfinish anodisedtooth profile narrow widecompatibility 9, 10, 11 or 12 speed cranks that use a raceface cinch interfaceframe compatibility 148mm boostshape ovalovality 12 13 degrees with a timing of 115 degrees after tdc top dead centreweight 227gbuy blackspire components from chain reaction cycles, the world's largest online bike store.