The GRX Rear Derailleur brings Shimano's chain stabilizing technology gravel cycling drivetrains, delivering smooth and precise shifting over technical terrain. It expands gravel bike capabilities, inspiring confidence on any surface and drives the evolution of road cycling to include greater elements of adventure. The GRX Rear Derailleur is available in 12 speed STI compatible options.
KEY FEATURES:
- Shimano Shadow RD+ chain stabilizer mechanism
- Compatible with current road Dual Control STI Levers
- Direct Mount Compatible
- Designed for use on 2x12 or 1x12 speed STI mechanical systems, One-Spec
- Rear Derailleur Mount Type: Shimano Rear Direct Mount , 1x12 Standard
- Drivetrain Speeds: 12
- Cage Length: Medium
- Largest Cog: 42
- Color: Black
- Rear Der/Shifter Compatibility: Shimano Road STI
SPECIFICATIONS:
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The all-new GRX Gravel group is the result of 40 years of development and innovation tested to the limit at the highest level of competition in road racing time trials and cyclo-cross.
GRX delivers concentration control and confidence with slick fast accurate performance that you can depend upon without distraction. GRX now has an 11-speed cassette with numerous gearing options to cover all situations.
Leading edge design materials and construction reduce weight improve stiffness and enhance control.
About Derailleurs Rear - Road/Gravel
Various derailleur systems were designed and built as far back as the late 1800s. A French bicycle tourist writer and cycling promoter Paul De Vivie (1853-1930) invented a two speed rear derailleur in 1905 which he used on forays into the Alps and we wonder if 20 gears are enough..... Since then there have been many advancements in the number of gears materials and reductions in weight.
Buy Online a Shimano GRX RX820 STI Rear Derailleur at TexasCyclesport.com
