The M8100 12 speed rear derailleur offers fast and precise shifts on any trail. It features a low profile design to minimise it catching on stray branches or rocks. It also features Shimano's adjustable clutch system and added bump stops for increased chain security and quieter operation even on the bumpiest terrain. Designed for use on Shimano's 12 speed wide range cassette, it can handle a massive 10-51T range, and comes with a larger 13T pulley for quieter shifts and better efficiency. The end result is a derailleur with faster, shock-less shifting, which is quiet throughout all its gear positions.

Who's this item for: Any riders wanting to run a Shimano 12 speed set up. It is designed with Trail and Enduro riders in mind.

Number of gears: 12 speed.

Weight: It weighs approximately 284gm.

Chain and cassette compatibility: It is compatible with 12speed chains and designed for use with Shimano's XT wide range cassette. For best shifting performance use with Shimano's Hyperglide+ XT chain.

Max cassette range: Can handle up to a 10-51T cassette.

Clutch style: Features an adjustable clutch that can be engaged and disengaged manually.

Cage length: This is a long cage derailleur.

Jockey wheel tooth count (top / bottom): It features 13T jockey wheels for quieter shifting.

Pros: Precise and quiet shifting. It is capable of a huge range. It includes an adjustable clutch and 13T jockey wheels for increased chain retention.

Cons: Although it features a low profile design, it may not favour bikes with lower ground clearance.