A unique bottom bracket type by Octane One. This special external BB for BMX cranks is compatible with all MTB frames with threaded bottom brackets (Euro BB). This solution has similar weight to Euro BB's but offers a lot more durable Spanish BB sealed bearings in external BB cups. Don't worry - the chain line is perfect for MTB!
-compatible with 19mm crank axles
-external aluminium cups with two big & strong Spanish BB sealed bearings
-compatible with all MTB frames with 68mm Euro BB & 73mm Euro BB (two sets of central spacers included)