Blackspire snaggletooth narrow wide chainring x01cnc machined from 7075 t6 aluminium, blackspire has made this version of its snaggletooth narrow wide chainring specific to srams x01 cranksets'. '.strtoupper('t')his means it has a 4x94mm bolt pattern for easy installation and once installed on to your ride, the narrow wide tooth profile brings you ultra reliable chain grip'. '.strtoupper('i')f you combine this mountain bike mtb chainring with a modern clutch type rear derailleur, you can ride the trails as hard as you dare, without ever worrying about dropping your chain.features material cnc 7075 t6 aluminium speed 9, 10 and 11 speed bolt circle diameter bcd 4x94mm compatibility sram 94mm bcd x01 cranks only thickness 5mm 28t version features built in bosses for a perfect 49mm chainline 28t version is also threaded for m8 x 11mm steel bolts narrow wide tooth profile laser etched graphics weight 226g approx.buy blackspire components from chain reaction cycles, the world's largest online bike store.