Rear derailleur bracket axles are recommended when using an OSPW in combination with the biggest cog officially suported by the rear derailleur, or bigger. They replace the original bracket. Cannot be used with direct mount frame hangers.

Rear derailleur stopper protects the derailleur from chain sucks and other failures.

Rear derailleur hanger washer increases spacing and changing performance on the smaller cogs by displacing the derailleur 1.5 mm outwards.