Sram GX 11 Speed Rear Derailleur SRAM it's been widely imitated but

it's been widely imitated but never improved upon

it gives maximum mud clearance with no risk of fouling or interfering during bottom out events

rear or both in any condition from winter mud to summer dust

Unlike any other fork axles on the market

Sram GX 11 Speed Rear Derailleur SRAM it's been widely imitated butThe Sram GX 11 Speed rear derailleur is engineered for smooth, reliable shifting actionfrom the larger upper pulley offset to the 12 tooth X SYNC pulley wheels. By eliminating unwanted chain movement, X HORIZON shifts faster, puts an end to ghost shifting and reduces shift force and chain slap. And with CAGE LOCK technology, wheel removal and installation are easier than ever.