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Black Shimano GRX RD-RX812 11-speed rear derailleur with Shadow+ technology and sleek, angular design.

Shimano GRX RD-RX812 11 Speed Rear Derailleur Shadow+ Black

by Shimano

£76.72from 3 retailers

GTIN04550170448882

EAN4550170448882

MPNRDRX812

Prices updated 6 Apr 2026

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Halfords

BEST PRICE

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£109.99£76.72

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Tweeks Cycles

In stock1 to 4 daysNew

£109.99£98.99

+£22.27 vs cheapest

Leisure Lakes Bikes

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£109.99

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Product Description

With 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 an ON/OFF switch for the chain tensioner. Its compatible with current road dual control lever and gives you precise shifting every time. Shimano Grx RD-RX812 11 Speed Derailleur Features Adjustable chain stabilizer prevents chain slapping & drops Smooth and reliable mixed surface shifting Compatible with current road dual control lever Top sprocket: Max. 11T/Min. 11T Low sprocket: Max. 42T/Min. 40T Total capacity: 31T

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From£76.72Halfords - Retail