Blackspire snaggletooth narrow wide oval chainringthe snaggletooth narrow wide oval chainring from blackspire makes pedalling easier for you when you're tackling hard climbs'. '.strtoupper('t')he oval chainring helps to create a supportive balance for when your legs need extra help for getting over the rotation'. '.strtoupper('t')he reality is that the power going to your rear wheel will be linear, making traction consistent, making it less likely to lose power or spin your wheel on hard climbs by avoiding the dead spot in your pedal rotation.features bolt circle diameter 104mm use for 1x drivetrains speed 9, 10, 11 and 12 speed compatible material cnc 7075 t 6 anodised aluminium ovality 12% 13%, timing of 115deg after tdc top dead center chainline 48.5mm weight 226gbuy blackspire components from chain reaction cycles, the world's largest online bike store.