Axle with the groove and uses the right had thread nut is the left hand (non drive side) axle. This axle tightens into the crank - aniclockwise.;Axle without the groove and uses the left had thread nut is the right hand (drive side) axle. This axle tightens into the crank - clockwise.

• DMR Vault Replacement 916 Axles Pair - One Colour , 9 16in

DMR Vault Replacement 916 Axles Pair - One Colour , 9 16inUpgrade