Blackspire snaggletooth narrow wide chainring xx1this highly efficient narrowwide chainring will grip the chain perfectly prevent chain drops and will increase confidence you have in your bikes drivetrain this version of this chainring is compatible with the sram xx1 cranks that have a 76mm bc d only featuresmaterial cnc 7075 t 6compatible sram 76mm bc d xx1 cranks onlythickness 5mmspeed 11 speedbuyblackspire componentsfrom chain reaction cycles the worlds largest online bike sto