Clean, tough, and simple Tighten up with a 6mm Allen key. Features a 6mm Allen key on the drive side of the axle if you manage to round the non drive side Constructed from 7075 aluminum and made to manufacturer's exact specifications Fits 160E, Arc, SB120, SB140 MY23+, SB160, SB135, ASR, SB165 MY24+ Original part may say 172mm length yet 174mm axle is still compatible