You want your bike to be able to do it all, then you need gears that can do it all.The Apex XPLR derailleur offers smooth jumps across a wide gear range, all with unrivalled chain safety and the simplicity of a 1x drivetrain.Shiftquickly and quietly from one 12-speed cassette to another with large 44-tooth sprockets, knowing you'll get the gears you need.Les + Produits Use with Flattop chain. Works with Apex and Eagle 12-speed mechanical shifters. Clutch controls chain tension for constant shifting. X-Horizon straight parallelogram design limits all movement to the horizontal axis, making ghost shifting impossible while reducing shifting force.Details Max. sprocket: 44 teeth. 12-speed compatible. Steel bearings. Aluminum derailleur hanger. Color : Black.Reference : 00.7518.177.000 / Rear derailleur Apex XPLR D1 MAX 44T 12 speed (Mechanical)