Shimano GRX RX820 2x12-speed Group Disc

The Shimano GRX R820 2x12-speed groupset combines Shimano's legendary precise mechanical shifting technology with extra-large range and gravel-specific ratios. Perfect for those looking for the most versatile top-level gravel bike groupset possible for endless dirt roads and tough climbs.

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Scope of delivery - Shimano GRX RX820 2x12-speed group disc

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For your riding freedom: the GRX RX820 2x12-speed disc group from Shimano

Gravelbiking should not be a complicated matter. The appeal of this cycling discipline with the drop bar and dirt roads lies in its simplicity, openness and adventure. No ride is impossible. Everyone can ride. The equipment should be functional and reliable without breaking the budget. That's why whether you're a seasoned gravel veteran or a newcomer to the rough roads and trails, you'll love the latest version of GRX, Shimano's groundbreaking and industry-first gravel-specific component group.

For riders looking for the best of both worlds, the new 2x12 RX820 UNDROPPABLE drivetrain is the right choice. With a 48/31 front chainring combination optimized for gravel and an 11-34 or 11-36 cassette, this drivetrain offers an extremely wide gear range so you can ride at a comfortable cadence whether you're pedaling on the flats, facing endless dirt roads, or tackling a massive off-road climb.

This setup features precise front and rear mechanical shifting and integrated SHADOW-PLUS chain stabilization for ultimate confidence on bumpy surfaces. The gravel-specific 2x12 option provides tighter rear cassette spacing, ideal for fine cadence changes during competitions and fast-paced weekend group rides. And thanks to the use of the proven HG freewheel body, the 2x12 setup pairs perfectly with most existing 700c wheels.

Alongside this range of gravel-optimized gearing options are the new ST-RX820 brake/shift levers. The new lever design was developed specifically for use with flare handlebars, which play an important role in graveling. It relies on a non-slip surface texture and significantly improved ergonomics that reduce pressure on your palms. Together, these changes increase comfort and control so you can fearlessly tackle tricky terrain or focus on the gravel road ahead.

The new GRX brake levers feature Shimano's Dual Control system with lightweight and responsive 12-speed mechanical shifting. While the left lever on the 2x12 GRX groupset offers Shimano's unmatched smooth derailleur shifting, the new 1x12 groupsets feature two left lever options: a brake lever-only model and a dropper-specific option that seamlessly integrates brake and dropper post operation for quick and effortless operation.

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Shimano GRX FC-RX820 2x12-speed crank

The new GRX FC-RX820-2 HOLLOWTECH II 2x12-speed crankset offers the perfect synthesis of light weight and high efficiency for mixed terrain riding. The transmission options address the specific requirements of Gravel and provide tighter gradations for a smooth rhythm.

Features

• Optimal gearing for different surfaces and riding styles
• Gravel-tuned gear ratio helps maintain rhythm on uneven terrain with wider tires
• Wide front gear range
• 17 teeth difference

Product features

• Use: Gravel, Cyclocross
• Group: GRX
• Model: FC-RX820-2
• Gradation: 48/31 teeth
• Q-Factor: 151mm
• Case width: 68 / 70mm
• Gear ratios front: 2-speed
• Rear gears: 12-speed
• Mounting: Hollowtech II
• Compatible chain: 12-speed HG
• 4-arm crank spider: Yes
• Bolt circle: 110/80mm
• Chainline: 47mm
• Recommended bottom bracket Pressfit: SM-BB72
• Recommended bottom bracket BSA: SM-BBR60

Crank arm length (choose variant)

• 170mm
• 172,5mm
• 175mm

Material

• Crank arms: aluminum, anodized
• Crank axle: steel, plated
• Chainrings: aluminum anodized

Color

• Series color

Weight

• approx. 721g/172.5mm (manufacturer information)

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Shimano GRX ST-RX820 2x12-speed STI unit + BR-RX820 disc brake set

A key concern of gravel riders is a reliable braking system with sufficient power reserves, the new Shimano GRX 2 x 12-speed STI levers ST-RX820 with BR-RX820 flat-mount calipers for hydraulic disc brakes feature excellent deceleration performance to keep control on steep, demanding or even surprising descents.

Features

• More control on changing terrain
• Ergonomics of lever and bracket adapted to gravel
• Anti-slip brake lever
• Shifting is as easy as on high quality road systems
• Don't be afraid to tackle rough terrain
• Excellent heat dissipation
• ICE TECHNOLOGIES
• Flat mount
• Easy adjustment and maintenance
• Convenient tool access
• Easy line connection system (J-Kit)
• Easy impeller change
• Simple, clean bleeding system
• ONE WAY BLEEDING
• Included in delivery: 1 x GRX ST-RX820 2x12-speed STI unit set, 2 x GRX BR-RX820 flat-mount brake caliper, 1 x flat-mount adapter 140mm/160mm, 2 x brake pads L05A-RF resin with cooling fins, 2 x brake line SM-BH90-JK-SS 1000mm / 1700mm (can be shortened), 4 x mounting screw forr brake caliper (for rear 2 x 38mm), 2 x cable connection kit, 2 x shift cable (Optislick) 1800mm / 2100mm, 2 x shift cable outer cover SIS OT-SP41 600mm, 1 x shift cable outer cover SIS OT-SP41 300mm, 1 x end caps + end covers
• J-Kit - SM-BH90-JK-SS brake lines are filled with mineral oil and pre-assembled on BR-RX820 calipers!

Product features

• Use: Gravel, Cyclocross
• Group: GRX
• Model: ST-RX820
• Type: Dual Control (STI)
• Mounting: left/right
• Gear ratios front: 2-speed
• Rear gears: 12-speed
• Optical gear indicator: no
• Grip width adjustment: Yes, with Wekzeug
• Handlebar diameter: 23.8mm/24.2mm
• Brake type: Hydraulic brake system (disc brake)
• Brake caliper: BR-RX820
• Brake caliper mount: Flat-Mount
• Brake pad: L05A-RF Resin with cooling fins
• Brake line: SM-BH90-JK-SS front 1000mm / rear 1700mm (can be shortened)
• One-Way-Bleeding: Yes
• Brake fluid: Mineral oil
• Recommended brake disc: SM-RT64, SM-RT70, SM-RT800

Material

• Lever: Aluminum
• Brake caliper: Aluminum

Color

• Series color

Weight

• approx. 572.5g/ST-RX820 pair | 267g/BR-RX820 pair (manufacturer information)

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Shimano GRX FD-RX820 2x12-speed front derailleur braze-on

The SHIMANO GRX RX-820-F 2 x 12-speed front derailleur impresses with smooth shifting and easy adjustment thanks to the link design and integrated tensioner. The chainline has been moved outward by 2.5 mm to allow more tire clearance for mixed terrain riding.

Features

• Ergonomic power curve
• Integrated tension adjustment
• Natural shifting feel
• Chainline +2.5 mm compared to conventional road bike derailleurs
• Compatible with up to 42 mm tires
• More cable routing options
• Higher wheel gap
• Front shifting with wider range
• Precise and easy derailleur adjustment
• 17 teeth gear ratio range

Product features

• Use: Gravel, Cyclocross
• Group: GRX
• Model: FD-RX820-F
• Fastening: Braze-on
• Cable guide: Down-Pull
• Gear front: 2-speed
• Gear rear: 12-speed
• Largest chainring: 48 teeth
• Total teeth capacity: 17 teeth
• Compatible chain: 12-speed HG
• Chain st. Angle: 63-66
• Chainline: 47mm

Material

• Aluminum
• Steel
• Fiberglass reinforced plastic

Color

• Series color

Weight

• approx. 95g (manufacturer information)

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Shimano GRX RD-RX820 2x12-speed rear derailleur

The SHIMANO GRX RD-RX820 2x12-speed rear derailleur with integrated chain stabilizer provides quiet, safe and precise shifting on mixed terrain. For rides on smooth surfaces, the chain stabilizer can be deactivated with the ON/OFF switch on the rear derailleur. The rear derailleur RD-RX820 is compatible with cassettes with a maximum of 36 teeth on the largest sprocket.

Features

• Quiet and smooth shifting system for rough terrain
• Adjustable chain stabilizer prevents the chain from jumping out
• SHIMANO SHADOW RD+
• Frictionless and reliable shifting in changing ground conditions
• Gear shifting with toggle switch ON or OFF to adapt to the terrain
• Stabilizer can be switched on or off depending on the terrain
• Spring tension adapted to Gravel
• Compatible with current DUAL-CONTROL shift/brake lever for road bike

Product features

• Use: Gravel, Cyclocross
• Group: GRX
• Model: RD-RX820
• Mounting: Direct mount (conventional)
• Technology: Shadow RD+
• Shift levels front: 2-speed
• Rear shift steps: 12-speed
• Compatible chain: 12-speed HG
• Max. Teeth large sprocket: 36 teeth
• Min. teeth large sprocket: 34 teeth
• Max. Teeth small sprocket: 11 teeth
• Max. Teeth small pinion: 11 teeth
• Max. Differential front: 17 teeth
• Total capacity: 42 teeth

Material

• Aluminum
• Steel
• Fiberglass reinforced plastic

Color

• Series color

Weight

• approx. 270g (manufacturer information)

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Shimano CS-R7100 / CS-HG710 12-speed cassettes

The Shimano CS-R7100-12 (11-34) and CS-HG710-12 (11-36) are the matching 12-speed cassettes to the new GRX RX820 group. Compatible with new HG L2 road 12-speed FREEHUB body.

Features

• revised 12-speed gradation for first-class efficiency and optimum acceleration in all situations
• Compatible with new HG L2 road 12-speed FREEHUB body

Product features

• Use: Gravel, Cyclocross
• Model: CS-R7100-12 / CS-HG710-12
• Type: Hyperglide L2 Road
• Gear ratios: 12-speed
• Recommended chain: 12-speed HG

Gradation (choose variant)

• 11-34 (11-12-13-14-15-17-19-21-24-27-30-34 teeth)
• 11-36 (11-12-13-14-15-17-19-21-24-28-32-36 teeth)

Material

• Pinion carrier: Aluminum
• Pinion: Steel
• Locking ring: steel

Weight

• approx. 345g/11-34 | 391g/11-36 (manufacturer information)

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Shimano CN-M8100 12-speed chain 126 links with Quick-Link

The special design of the Shimano CN-M8100 12-speed chain provides improved shifting performance and smoother running - even in rough terrain. The also new SM-CN910-12 Quick-Link closure allows for easy installation.

Features

• Special chain design for new drive components
• Better chain guide with a larger area at the end of the inner plate, which holds the tooth to the front and cassette sprocket
• Improved shifting performance
• Easy assembly
• Smoother ride even in rough terrain
• Compatible with the new generation of drivetrain components
• Comes with the user-friendly Quick-Link (SM-CN910-12)
• Quick-Link pliers for installation and removal (TL-CN10) - Not included!

Product features

• Use: MTB, Gravel, Cyclocross
• Model: CN-M8100
• Gear ratios front: 1/2-speed
• Shift stages rear: 12-speed
• Type: HG
• Hollow pin: No
• Outer plate coating: SIL-TEC
• Coating of the inner plate: Chromizing
• Closure: Quick-Link SM-CN910-12

Links

• 126

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Shimano GRX 12-speed

• Manufacturer number: GRX8202X1211361754831


Manufacturer:
SHIMANO INC.
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
590-8577 Osaka
Japan
https://www.shimano.com


Person responsible in the EU:
Shimano Europe BV
High Tech Campus 92
NL-5656 Eindhoven
Netherlands
[email protected]
https://www.shimano.com