819,00 €
incl. 19% VAT
- In stock, delivery time 1-3 Days
Product information "GRX RX820 1x12-speed Group Disc"
Scope of delivery - Shimano GRX RX820 1x12-speed group disc
- 1 x Shimano GRX FC-RX820 FC-1x12-speed crankset (gradation and crank arm length - choose variant)
- 1 x Shimano GRX BL-RX820-L+BR-RX820 front disc brake
- 1 x Shimano GRX ST-RX820+BR-RX820 12-speed disc brake rear
- 1 x Shimano GRX RD-RX822 1x12-speed rear derailleur
- 1 x Shimano CS-M8100 12-speed cassette incl. circlip (choose variant)
- 1 x Shimano CN-M8100 12-speed chain 126 links with Quick-Link
For your freedom while riding: the GRX RX820 1x12-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 be thrilled with the latest version of the GRX, Shimano's groundbreaking and industry-first gravel-specific component group.
If you're aiming for personal best times on your next tour or want to compete in a race, you'll appreciate the RX820 1x12 setup's shifting levels with a 10-45 cassette and 40- or 42-tooth chainring. Just like its 11-speed predecessor, the RX820 offers smooth, reliable shifting, but now features a wider range and an extra sprocket, making it easier to find the optimal cadence to maintain your position in the field. This system uses a mid-cage rear derailleur with an integrated SHADOW PLUS chain stabilizer for quieter shifting and a more secure chain guide on rough terrain. Don't worry about the next shift, just focus on leaving the competition behind.
If all-day - or multi-day - adventures with lots of climbs are your thing, the new RX820 1x12 UNSTOPPABLE option with SHIMANO's wide 10-51T cassette range is ideal. Combined with a 40- or 42-inch chainring, you'll never run out of gears on even the steepest village road or in the high mountains. Like the 1x12 variant with 10-45T, this group also has an integrated SHADOW-PLUS chain stabilizer for optimum chain security and an ON/OFF switch, which allows for quick and easy removal of the wheel in the event of a puncture.
Both 1x12 options use Micro Spline, Shimano's lightweight aluminum freewheel design that pairs seamlessly with a small 10-tooth sprocket and features smaller, more widely spaced teeth that reduce sprocket wear. The 1x12 Gravel crankset is offered in three crank arm lengths, so you can choose the ideal Shimano GRX setup for your needs and riding style.
Alongside this range of Gravel-tuned gear 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.
Shimano GRX FC-RX820 1x12-speed crank
The new GRX FC-RX820-1 HOLLOWTECH II 1x12-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 a smooth rhythm with tighter graduations. The gear options address the specific requirements of off-road and provide a smooth rhythm with tighter ratios. The 1 x 12-speed crankset is available with 40 and 42 tooth chainrings and in 170, 172.5 and 175mm crank arm lengths.Features
- Optimal gear ratio for different surfaces and different riding styles
- On Gravel tuned gear ratio helps to maintain the driving rhythm even on uneven terrain with wider tires
- Option with cassettes 10-45 and 10-51 for a variety of riding styles
Product features
- Use: Gravel, Cyclocross
- Group: GRX
- Model: FC-RX820-1
- Q-Factor: 151mm
- Case width: 68 / 70mm
- Gear ratios front: 1-speed
- Shift steps rear: 12-speed
- Mounting: Hollowtech II
- Compatible chain: 12-speed HG
- 4-arm crank spider: Yes
- Bolt circle: 110mm
- Chainline: 49.7mm
- Recommended bottom bracket Pressfit: SM-BB72
- Recommended bottom bracket BSA: SM-BBR60
Gradation (choose variant)
- 40 teeth
- 42 teeth
Crank arm length (choose variant)
- 170mm
- 172,5mm
- 175mm
Material
- Crank arms: aluminum, anodized
- Crank axle: steel, plated
- Chainring: aluminum anodized
Color
- Series color
Weight
- approx. 655g/40/172,5mm | 667g/42/172,5mm (manufacturer's specification)
Shimano GRX BL/ST-RX820 1x12-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 1 x 12-speed BL-RX820-L brake levers / STI levers ST-RX820 with BR-RX820 flat-mount calipers for hydraulic disc brakes feature excellent deceleration performance to keep control on steep, challenging or even surprising descents.Features
- SHIMANO GRX BL-RX820-L brake lever works with SHIMANO's leading hydraulic disc brakes to provide greater control on mixed terrain
- Left mounting position for 1 x 12-speed shifting system
- 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 BL-RX820-L brake lever left, 1 x GRX ST-RX820 12-speed STI unit right, 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 (kürzbar), 4 x fixing screw for brake caliper (for rear 2 x 38mm), 2 x cable connection kit, 1 x shift cable (Optislick) 2100mm, 1 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: BL-RX820-L / ST-RX820-R
- Type: Brake lever / Dual Control (STI)
- Mounting: left / right
- Shiftlevels front: 1-speed
- Rear shift steps: 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. 511.2g/ST-RX820 pair | 267g/BR-RX820 pair (manufacturer's specification)
Shimano GRX RD-RX822 1x12-speed rear derailleur
The SHIMANO GRX RD-RX822 1x12-speed rear derailleur with integrated chain stabilizer provides quiet, secure and precise shifting on mixed terrain. The GS variant is compatible with 10-45 teeth and the SGS variant with 10-51 teeth 12-speed SHIMANO MTB cassettes.Features
- Quiet and smooth shifting system for uneven terrain
- Adjustable chain stabilizer prevents the chain from jumping out
- SHIMANO SHADOW RD+
- Frictionless and reliable shifting in changing ground conditions
- Spring tension adapted to gravel
- Compatible with current DUAL-CONTROL shift/brake lever for road bike
- RD-RX822-GS
- 45 teeth max. large sprocket
- Works with 12-speed 10-45 cassette
- Better ground clearance (shorter cage)
- RD-RX822-SGS
- 51 teeth max. large sprocket
- Works with 12-speed 10-51 cassette
Product features
- Use: Gravel, Cyclocross
- Group: GRX
- Model: RD-RX822
- Mounting: Direct mount (conventional)
- Technology: Shadow RD+
- Gear ratios:
- GS-type 1x12-speed (10-45 cassette).
- SGS type 1x12-speed (10-51 cassette)
- Compatible chain: 12-speed HG
- Max. teeth large sprocket: 45 teeth (GS) / 51 teeth (SGS)
- Min. teeth large sprocket: 45 teeth (GS) / 51 teeth (SGS)
- Max. teeth small pinion: 10 teeth
- Min. teeth small sprocket: 10 teeth
- Max. Differential front: 0 teeth
- Total capacity: 35 teeth (GS) / 41 teeth (SGS)
Cage length
- Type-GS medium length
- Type-SGS long
Material
- Aluminum
- Steel
- Glass fiber reinforced plastic
Color
- Series color
Weight
- approx. 290g/GS | 288g/SGS (manufacturer's specification)
Shimano CS-M8100 12-speed cassette
The Shimano CS-M8100 with Hyperglide+ for faster shifting is the matching cassette to the new GRX R820 1 x 12-speed group. For the 12-speed cassette SHIMANO has revised the design of the freehub in the CS-M8100 and uses the new MICRO SPLINE technology.
Features
- Shifting options
- 10-45 (12-speed, Rhythm Step gear ratio for cross country)
- 10-51 (12-speed, large gear range for enduro)
- Hyperglide+ faster shifting, improved speed, shifting efficiency and smoothness on any terrain
- Material Aluminum and steel
- BEAM SPIDER construction Faster acceleration
- MICRO SPLINE FREEHUB cassette hub integrates seamlessly with small upper 10-tooth sprockets
Product features
- Use: Gravel, Cyclocross
- Model: CS-RM8100-12
- Type: Hyperglide+
- Gear ratios: 12-speed
- Recommended chain: 12-speed HG
Gradation (choose variant)
- 10-45 (10-12-14-16-18-21-24-28-32-36-40-45 teeth)
- 10-51 (10-12-14-16-18-21-24-28-33-39-45-51 teeth)
Material
- Aluminum
- Steel
Weight
- ca. 461g - 10-45 (manufacturer's specification)
- approx. 470g - 10-51 (manufacturer's specification)
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
- Shiftstages 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
Shimano GRX 12-speed
- Manufacturer number: GRX8201X12104517542
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
590-8577 Osaka
Japan
https://www.shimano.com
High Tech Campus 92
NL-5656 Eindhoven
Netherlands
[email protected]
https://www.shimano.com
Shimano GRX RX820 1x12-speed Group Disc
Scope of delivery - Shimano GRX RX820 1x12-speed group disc
- 1 x Shimano GRX FC-RX820 FC-1x12-speed crankset (gradation and crank arm length - choose variant)
- 1 x Shimano GRX BL-RX820-L+BR-RX820 front disc brake
- 1 x Shimano GRX ST-RX820+BR-RX820 12-speed disc brake rear
- 1 x Shimano GRX RD-RX822 1x12-speed rear derailleur
- 1 x Shimano CS-M8100 12-speed cassette incl. circlip (choose variant)
- 1 x Shimano CN-M8100 12-speed chain 126 links with Quick-Link
For your freedom while riding: the GRX RX820 1x12-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 be thrilled with the latest version of the GRX, Shimano's groundbreaking and industry-first gravel-specific component group.
If you're aiming for personal best times on your next tour or want to compete in a race, you'll appreciate the RX820 1x12 setup's shifting levels with a 10-45 cassette and 40- or 42-tooth chainring. Just like its 11-speed predecessor, the RX820 offers smooth, reliable shifting, but now features a wider range and an extra sprocket, making it easier to find the optimal cadence to maintain your position in the field. This system uses a mid-cage rear derailleur with an integrated SHADOW PLUS chain stabilizer for quieter shifting and a more secure chain guide on rough terrain. Don't worry about the next shift, just focus on leaving the competition behind.
If all-day - or multi-day - adventures with lots of climbs are your thing, the new RX820 1x12 UNSTOPPABLE option with SHIMANO's wide 10-51T cassette range is ideal. Combined with a 40- or 42-inch chainring, you'll never run out of gears on even the steepest village road or in the high mountains. Like the 1x12 variant with 10-45T, this group also has an integrated SHADOW-PLUS chain stabilizer for optimum chain security and an ON/OFF switch, which allows for quick and easy removal of the wheel in the event of a puncture.
Both 1x12 options use Micro Spline, Shimano's lightweight aluminum freewheel design that pairs seamlessly with a small 10-tooth sprocket and features smaller, more widely spaced teeth that reduce sprocket wear. The 1x12 Gravel crankset is offered in three crank arm lengths, so you can choose the ideal Shimano GRX setup for your needs and riding style.
Alongside this range of Gravel-tuned gear 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.
Shimano GRX FC-RX820 1x12-speed crank
The new GRX FC-RX820-1 HOLLOWTECH II 1x12-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 a smooth rhythm with tighter graduations. The gear options address the specific requirements of off-road and provide a smooth rhythm with tighter ratios. The 1 x 12-speed crankset is available with 40 and 42 tooth chainrings and in 170, 172.5 and 175mm crank arm lengths.Features
- Optimal gear ratio for different surfaces and different riding styles
- On Gravel tuned gear ratio helps to maintain the driving rhythm even on uneven terrain with wider tires
- Option with cassettes 10-45 and 10-51 for a variety of riding styles
Product features
- Use: Gravel, Cyclocross
- Group: GRX
- Model: FC-RX820-1
- Q-Factor: 151mm
- Case width: 68 / 70mm
- Gear ratios front: 1-speed
- Shift steps rear: 12-speed
- Mounting: Hollowtech II
- Compatible chain: 12-speed HG
- 4-arm crank spider: Yes
- Bolt circle: 110mm
- Chainline: 49.7mm
- Recommended bottom bracket Pressfit: SM-BB72
- Recommended bottom bracket BSA: SM-BBR60
Gradation (choose variant)
- 40 teeth
- 42 teeth
Crank arm length (choose variant)
- 170mm
- 172,5mm
- 175mm
Material
- Crank arms: aluminum, anodized
- Crank axle: steel, plated
- Chainring: aluminum anodized
Color
- Series color
Weight
- approx. 655g/40/172,5mm | 667g/42/172,5mm (manufacturer's specification)
Shimano GRX BL/ST-RX820 1x12-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 1 x 12-speed BL-RX820-L brake levers / STI levers ST-RX820 with BR-RX820 flat-mount calipers for hydraulic disc brakes feature excellent deceleration performance to keep control on steep, challenging or even surprising descents.Features
- SHIMANO GRX BL-RX820-L brake lever works with SHIMANO's leading hydraulic disc brakes to provide greater control on mixed terrain
- Left mounting position for 1 x 12-speed shifting system
- 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 BL-RX820-L brake lever left, 1 x GRX ST-RX820 12-speed STI unit right, 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 (kürzbar), 4 x fixing screw for brake caliper (for rear 2 x 38mm), 2 x cable connection kit, 1 x shift cable (Optislick) 2100mm, 1 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: BL-RX820-L / ST-RX820-R
- Type: Brake lever / Dual Control (STI)
- Mounting: left / right
- Shiftlevels front: 1-speed
- Rear shift steps: 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. 511.2g/ST-RX820 pair | 267g/BR-RX820 pair (manufacturer's specification)
Shimano GRX RD-RX822 1x12-speed rear derailleur
The SHIMANO GRX RD-RX822 1x12-speed rear derailleur with integrated chain stabilizer provides quiet, secure and precise shifting on mixed terrain. The GS variant is compatible with 10-45 teeth and the SGS variant with 10-51 teeth 12-speed SHIMANO MTB cassettes.Features
- Quiet and smooth shifting system for uneven terrain
- Adjustable chain stabilizer prevents the chain from jumping out
- SHIMANO SHADOW RD+
- Frictionless and reliable shifting in changing ground conditions
- Spring tension adapted to gravel
- Compatible with current DUAL-CONTROL shift/brake lever for road bike
- RD-RX822-GS
- 45 teeth max. large sprocket
- Works with 12-speed 10-45 cassette
- Better ground clearance (shorter cage)
- RD-RX822-SGS
- 51 teeth max. large sprocket
- Works with 12-speed 10-51 cassette
Product features
- Use: Gravel, Cyclocross
- Group: GRX
- Model: RD-RX822
- Mounting: Direct mount (conventional)
- Technology: Shadow RD+
- Gear ratios:
- GS-type 1x12-speed (10-45 cassette).
- SGS type 1x12-speed (10-51 cassette)
- Compatible chain: 12-speed HG
- Max. teeth large sprocket: 45 teeth (GS) / 51 teeth (SGS)
- Min. teeth large sprocket: 45 teeth (GS) / 51 teeth (SGS)
- Max. teeth small pinion: 10 teeth
- Min. teeth small sprocket: 10 teeth
- Max. Differential front: 0 teeth
- Total capacity: 35 teeth (GS) / 41 teeth (SGS)
Cage length
- Type-GS medium length
- Type-SGS long
Material
- Aluminum
- Steel
- Glass fiber reinforced plastic
Color
- Series color
Weight
- approx. 290g/GS | 288g/SGS (manufacturer's specification)
Shimano CS-M8100 12-speed cassette
The Shimano CS-M8100 with Hyperglide+ for faster shifting is the matching cassette to the new GRX R820 1 x 12-speed group. For the 12-speed cassette SHIMANO has revised the design of the freehub in the CS-M8100 and uses the new MICRO SPLINE technology.
Features
- Shifting options
- 10-45 (12-speed, Rhythm Step gear ratio for cross country)
- 10-51 (12-speed, large gear range for enduro)
- Hyperglide+ faster shifting, improved speed, shifting efficiency and smoothness on any terrain
- Material Aluminum and steel
- BEAM SPIDER construction Faster acceleration
- MICRO SPLINE FREEHUB cassette hub integrates seamlessly with small upper 10-tooth sprockets
Product features
- Use: Gravel, Cyclocross
- Model: CS-RM8100-12
- Type: Hyperglide+
- Gear ratios: 12-speed
- Recommended chain: 12-speed HG
Gradation (choose variant)
- 10-45 (10-12-14-16-18-21-24-28-32-36-40-45 teeth)
- 10-51 (10-12-14-16-18-21-24-28-33-39-45-51 teeth)
Material
- Aluminum
- Steel
Weight
- ca. 461g - 10-45 (manufacturer's specification)
- approx. 470g - 10-51 (manufacturer's specification)
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
- Shiftstages 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
Shimano GRX 12-speed
- Manufacturer number: GRX8201X12104517542
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi
590-8577 Osaka
Japan
https://www.shimano.com
High Tech Campus 92
NL-5656 Eindhoven
Netherlands
[email protected]
https://www.shimano.com
Ich habe mir die Gruppe einzeln gekauft, da ich die Bremssättel und die Scheiben nicht benötigt habe. Ich habe sie an meinem Surly Midnight Special mit einem 42er Kettenblatt und einer 10/51 Kassette verbaut und heute die erste Ausfahrt absolviert. Mir gefällt die Laufruhe und die Schaltpräzision sehr. Ich habe auf meinem Focus Atlas die 810er GRX mit 2/12 verbaut und daher einen guten Vergleich. Die 810er ist auch eine sehr gute Gruppe aber es gibt immer Momente wo unter Last die Kette am vorderen Umwerfer schleift. Shimano hat zwar deswegen eine dritte Schaltstufe für den Umwerfer vorgesehen aber die 820er kennt dieses Problem natürlich nicht. Die 820er ist sehr angenehm und stressfrei zu fahren weswegen mir die feinere Gangabstufung der 810er und die etwas höhere Endgeschwindigkeit nicht fehlt. Ich bin mit der 820 sehr zufrieden.
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