The SHIMANO GRX derailleur delivers a quieter riding experience and more reliable and precise shifting over varied terrain. Its integrated chain stabilizer prevents chain slap and drop. The SHIMANO SHADOW RD+ delivers silent, seamless rear shifting over rough terrain. It features an on/off switch for chain tensioning on flat surfaces. It is compatible with road cassettes up to a 42T cog. The RD-RX812 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. The derailleur is compatible with current DUAL CONTROL LEVER road bikes. The average weight of the derailleur is 267 grams.

• Model: RD-RX812
• Series: GRX 11-speed
• Color: Group color
• Average weight: 267 grams
• Compatible chain: LINKGLIDE, HG 11-speed
• Capacity: 31T
• B-axis hollow axle: Yes
• Cable adjuster: Yes
• Direct mounting (conventional): Yes
• Fluorine coated pivot bushings: 4
• Largest sprocket Max.: 42T
• Largest sprocket Min.: 40T
• Derailleur wheel lower upper derailleur wheel: Yes
• Derailleur pulley recessed type derailleur pulley bolt: Yes
• Derailleur pulley teeth: 13T
• Derailleur pulley lower derailleur pulley: Yes
• Top-Normal suspension type SHIMANO SHADOW RD+: Yes
• Smallest sprocket Max.: 11T
• Smallest sprocket Min.: 11T
• Rear gears: 11