Shimano GRX RD-RX812 Rear DerailleurWith an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON OFF switch for the chain tensioner. The RD RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max. BENEFIT Silent and uninterrupted rear shifting on rough terrain FEATURE Adjustable chain stabilizer prevents

It has an injection molded carbon composite body

the SHIMANO DEORE XT M8025 front derailleurs offer secure

Super waterproof

The SM-SH12 cleats are included in delivery

An operation of components with different firmware versions may cause a malfunction or loss of function

Remarks: 10 pins per platform

Bottle holder made of high-strength aluminium alloy

0    : Yes

Weight - 234g

Ground clearance (°) 33

- Upper pinion: max 11D / min

Smart and efficient gear selection with Shimano Synchro Shift