A complete 2×10-speed Cues U6000 kit would be almost exactly the same with levers, hydraulic brake calipers & rotors, a 2x crankset, front & rear derailleurs, cassette, and chain selling for $891.

Shimano clutch derailleurs are only really available for 10-speed rear cassettes and up, due to a change in derailleur ratio compared to the earlier 6 to 9 speed cassettes.

Rear derailleur: “The 12-speed Shimano Deore rear derailleur (RD-M6100-SGS) enables precise and quick shifting within the 10-51T range. 13-tooth pulley wheels and Shimano Shadow RD+ technology reduces ...

The RD-M8250 wireless rear derailleur comes in GS – for use with 9-45T cassette – and SGS – for use with 10-51T Cassette. For e-bike riders, RD-M8260 comes as Long Cage SGS, which supports both ...

The new Shimano Deore XT rear derailleur again uses the company's low-profile Shadow design and as expected, faithfully rattles off precise and accurate shifts. We did experience a fair bit of ...