SHIMANO jumped into gravel headfirst with the first full purpose-made component group for gravel. GRX features unique ergonomics, wider chainline for added tire clearance, tuned gearing options in both 1×11 and 2×11, and gravel-specific brakes with improved modulation. Here are all the details, weights, and pricing.

Following a multi-year research and development process, Shimano just introduced its first (and the only) dedicated gravel component line: SHIMANO GRX. For 2020, the full SHIMANO GRX lineup includes 1×11, 2×11 cranksets and derailleurs—with mechanical and Di2 electronic options—value-based 2×10 options, shifter levers with dropper integration and “gravel-tuned” ergonomics, “gravel-tuned” hydraulic brakes, and a GRX-series wheelset.

Some of the standout features I found include their claimed improved braking (over their road hydros), raised pivots in the brake levers for added control, bikepacking-friendly-specific/wider-range 2x crankset gear ratio (48-31T), and a 5mm wider chainline on all of the cranksets for added tire clearance—2.5mm on each side Q-factor.

It’s worth noting that the 1x cranksets only come in 40T and 42T chainrings, for now. SHIMANO mentioned that they could probably fit 34 or 36T rings, but there are not any available at the moment.

SHIMANO GRX gravel drivetrain

SHIMANO GRX 11-speed drivetrain

In a nutshell, SHIMANO GRX was designed to be a quiet-running drivetrain that’s specially tuned gravel terrain, riding positions, and gravel bike designs. To accomplish this, SHIMANO claims the new GRX blends Shimano’s drivetrain technologies from both road and mountain bike components to deliver high level shifting precision and stability. For the sake of simplicity, Shimano GRX runs cassettes and chains that already exist in the Shimano lineup. In addition to the top-end SHIMANO GRX 800 series, there are also two lower cost 11-speed components: a 600-series crank and shifter set, which can be mixed seamlessly with 800 level parts. Here are descriptions and specs on each taken directly from Shimano. Find pricing below each spec.

SHIMANO GRX gravel drivetrain

SHIMANO GRX Cranksets

RX810 series cranks offer Shimano’s widest-ever delta between small and large chainrings, a 17-tooth gap, that also debuts the company’s first ever 48-31T option. This, when paired with the available 11-34 cassette, offers an exceptionally low climbing gear while maintaining a 48-11 ratio that allows riders to take advantage of strong tailwinds and long descents. RX810 series cranks also are available in a single chainring option for those who prefer the simplicity and decreased weight of a 1×11 drivetrain with one of Shimano’s wide ratio 11-40 or 11-42T cassettes.

SHIMANO GRX 2x11

FC-RX810-2

  • Wider-range 48-31T, 2×11 crankset for longer adventures and more challenging terrain
  • Crank arm length: 170 mm, 172.5 mm, 175 mm
  • SHIMANO HOLLOWTECH II construction
  • 722 g
SHIMANO GRX 1x11

FC-RX810-1

  • 1×11 gearing for gravel and cyclocross
  • Crank arm length: 170 mm, 172.5 mm, 175 mm
  • Chainring options: 40T, 42T – SHIMANO HOLLOWTECH II construction
  • 655 g

Shimano GRX’s mid-priced RX600 cranks employ a 2-piece design and are available in 2×11 and 1×11 configurations. All GRX cranksets use a new, +2.5mm chainline for increased tire and frame clearance.

SHIMANO GRX 2x11

FC-RX600-11

  • Wider-range 46-30T, 2×11 crankset
  • Crank arm length: 165mm, 170 mm, 172.5 mm, 175 mm
  • 816g
SHIMANO GRX 1x11

FC-RX600-1

  • Crank arm length: 165mm, 170 mm, 172.5 mm, 175 mm
  • Chainring: 40T
  • 753 g
  • RX600 2×10-speed crank with chainrings $129.99
  • RX600 1×11-speed crank with chainring $146.99
  • RX600 2×11-speed crank with chainrings $146.99
  • RX810 1×11-speed crank with chainrings $224.99
  • RX810 2×11-speed crank with chainrings $224.99
SHIMANO GRX gravel drivetrain

SHIMANO GRX Derailleurs

Shimano GRX front derailleurs offer more tire, debris, and frame clearance thanks to a new outboard +2.5mm chainline design also found on GRX series cranks. Because of the outboard chainline, GRX front derailleurs must be used with GRX cranksets and vice versa. RX800 series front derailleurs deliver Shimano’s legendary front shifting performance while increasing front gearing range to a 17T delta. They are available in mechanical and Di2 versions.

SHIMANO GRX front derailleur

FD-RX815-F

  • Di2 electronic precision shifting
  • 17T front range capacity
  • 131g
SHIMANO GRX front derailleur

FD-RX810-F

  • Lighter front shifting with ergonomic power curve
  • Toggle link construction offers more cable routing options
  • Precise and easy adjustment with integrated cable tension adjustment
  • 94g
  • RX400 2×10-speed front derailleur $36.99
  • RX810 2×11-speed mechanical front derailleur $51.99
  • RX815 2×11-speed Di2 front derailleur $226.99

All Shimano GRX rear derailleurs utilize Shimano’s proven SHADOW RD+ technology that has been tuned specifically for gravel, enabling riders to adjust the chain stabilizer to match the terrain: engage for a remarkably quiet ride with uninterrupted shifting off- road, or disengage for tarmac. Shimano GRX rear derailleurs are available in short (30- 34T low) or long cage (40-42T low) options for use with either road or mountain bike cassettes depending on the ideal range. RX800 rear derailleurs are available in both mechanical or Di2 configurations.

SHIMANO GRX rear derailleur, gravel

RD-RX815/RD-RX817 (Di2)

  • SHIMANO SHADOW RD+ stabilization
  • Compatible with existing Di2 DUAL CONTROL levers
  • Max. cassette range: RX815 (30-34T low); RX817 (40-42T low)
  • Max. front chainring range: 17T(RX815 only)
  • Capacity: RX815 – 38T; RX817 – 31T
  • 288/322 g
SHIMANO GRX rear derailleur, gravel

RD-RX810/RD-RX812

  • SHIMANO SHADOW RD+ stabilization
  • Compatible with existing 11-speed mechanical DUAL CONTROL levers
  • Max. cassette range: RX810 (30-34T low); RX812 (40-42T low)
  • Max. front chainring range: 17T (RX810 only)
  • Capacity: RX810 – 38T; RX812 – 31T
  • 251/264 g
  • RX400 2×10-speed rear derailleur $62.99
  • RX810 2×11-speed mechanical rear derailleur $111.99
  • RX812 1×11-speed mechanical rear derailleur $113.99
  • RX815 2×11-speed Di2 rear derailleur $286.99
  • RX817 1×11-speed Di2 rear derailleur $319.99
  • SHIMANO GRX gravel drivetrain
  • SHIMANO GRX gravel drivetrain

SHIMANO GRX Brake/shifter Levers

SHIMANO GRX has two new gravel-specific ergonomic hydraulic disc brake lever designs for riders, creating a variety of handlebar positions to solve gravel riders’ needs in rough terrain and for long-distance comfort. New GRX DUAL CONTROL levers feature a unique new gravel-specific ST design for optimal braking from the hoods thanks to the brake lever axis being raised by 18mm. Additionally, a new curved brake lever design optimizes brake feel and power. To ensure grip in the worst conditions the brake levers have a unique anti-slip texture application.

In another industry first, a new hydraulic sub-brake lever is offered for the top of the handlebars. It creates more braking options, ideal for cyclocross, modern flared handlebars, and riders of all abilities.

To integrate the use of dropper posts in gravel, SHIMANO created the GRX mechanical ST-RX810-LA left hydraulic disc brake lever that, when used with a 1×11 drivetrain, can control a dropper post while also keeping the cockpit tidy. The use of an integrated cable pulling system allows for 9mm lever throw to operate a dropper post. SHIMANO GRX also includes GRX600 and 800-series left side hydraulic disc brake levers with no dropper or shift internals for use with 1×11 drivetrains.

SHIMANO GRX lever, gravel

ST-RX815-L/R Di2 Hydraulic Disc Brake DUAL CONTROL LEVER

  • More secure grip in rough terrain from higher brake axis, anti-slip lever, thumb notch on hood, taller hood prevents hand slippage
  • TBD g
SHIMANO GRX lever, gravel

BR-RX810 Left side hydraulic disc brake lever

  • Simple focus on hydraulic disc brake operation only
  • TBD g

ST-RX810-LA Left side dropper post lever

  • Left side lever that streamlines handlebar by controlling dropper post
  • Works with most dropper posts with cable heads at the shift lever
  • TBDg

ST-RX810-L/R Hydraulic Disc Brake DUAL CONTROL LEVER

  • Gravel-inspired ergonomics and textured lever for extra grip
  • 11-speed shifting range
  • Light, high performance mechanical shifting
  • 565g

BL-RX812L/R Hydraulic Disc Sub-Brake Lever

  • Brake access in multiple positions
  • Quick braking while upright and in often fatigued riding position
  • TBD g

—

ST-RX600-L/R Hydraulic Disc Brake DUAL CONTROL LEVER

  • Gravel-inspired ergonomics and textured lever for extra grip
  • 11-speed shifting range
  • Light, high performance shifting
  • 611g

—

  • RX600 shifter/brake set RX600(L) / BR-RX400(F) $301.99
  • RX600 shifter/brake set RX600(right) / R-RX400(rear) $301.99
  • RX400 shifter/brake set RX400(L) / BR-RX400(F) $269.99
  • RX400 shifter/brake set RX400(right) / BR-RX400(R) $269.99
  • RX810 shifter/brake set RX810(L) / BR-RX810(F) $391.99
  • RX810 shifter/brake set RX810(right) / BR-RX810(rear) $391.99
  • RX815 Di2 shifter/brake set RX815(L) / BR-RX810(F) $390.99
  • RX815 Di2 shifter/brake set RX815(right) / BR-RX810(rear) $390.99

—

  • RX810 hydraulic disc brake + dropper lever set with ST-RX810(LA)/BR-RX810 (F) $364.99
  • RX810 hydraulic disc brake assembled set with BL-RX810(L) + BR-RX810(F) $337.99

—

  • RX600 left hydraulic disc brake lever $184.99
  • RX800 left hydraulic disc brake lever $214.99
  • RX812 left hydraulic disc brake sub lever $65.99
  • RX812 right hydraulic disc brake sub lever $65.99

—

  • RX400 2×10-speed left shift/brake lever $164.99
  • RX400 2×10-speed right shift/brake lever $164.99
  • RX600 2×11-speed left shift/brake lever $204.99
  • RX600 11-speed left shift/brake lever $204.99
  • RX810 2×11-speed mechanical left shift/brake lever $269.99
  • RX815 11-speed mechanical right shift/brake lever $269.99
  • RX810 2×11-speed Di2 left shift/brake lever $269.99
  • RX815 11-speed Di2 right shift/brake lever $269.99

—

  • Shimano GRX seatpost dropper left mechanical lever $244.99

GRX hydraulic disc brake calipers are flat mount designs that are offered in premium 810 series and 400 series. The calipers deliver powerful braking performance with ICE TECHNOLOGIES heat-dissipating disc brake pads and simple set up and maintenance thanks to Shimano’s ONE-WAY BLEEDING.

  • SHIMANO GRX hydraulic brakes
  • SHIMANO GRX hydraulic brakes
  • RX400 front flat mount hydraulic disc brake caliper $60.99
  • RX400 rear flat mount hydraulic disc brake caliper $54.99
  • RX810 front flat mount hydraulic disc brake caliper $81.99
  • RX810 rear flat mount hydraulic disc brake caliper $75.99

10-speed SHIMANO GRX drivetrain

SHIMANO GRX also includes a 2×10-speed drivetrain for the price conscious that uses a blended specification of RX600 and unique RX400 components. The 10-speed GRX drivetrain utilizes several of the new designs and features of premium GRX series.

FC-RX600-10

  • Nearly identical offering to FC-600 11- speed cranks
  • 2-piece, 10-speed crankset
  • Wide range 46-30T design
  • Crank arm length: 165mm, 170 mm, 172.5 mm, 175 mm
  • 819 g

FD-RX400 Front Derailleur

  • Similar tire clearance and features as premium GRX FD
  • Lighter front shifting with ergonomic power curve
  • Toggle link construction offers more cable routing options
  • Precise and easy adjustment with integrated cable tension adjustment
  • Total capacity: 16T
  • 95g

ST-RX400-L/R Hydraulic Disc Brake DUAL CONTROL LEVER (10-speed)

  • Gravel-inspired ergonomics and textured lever for extra grip
  • 10-speed shifting range
  • Light, high performance shifting from premium shifters
  • 613 g

RD-RX400 SHIMANO SHADOW RD+

  • Similar stabilizer technology and design as premium GRX series
  • Compatible with existing Shimano mechanical 10-speed road ST
  • Max. cassette range: 36-30T low)
  • Max. front chainring range: 16T – 41T capacity
  • 303 g

SHIMANO GRX-series Wheelset

With its new GRX-series wheels Shimano tips its cap to the experimental spirit of gravel. Offered in both 700c and 650b, the WH-RX570 is an affordable, durable way to continue blurring the lines between road and mountain categories. Both options feature a wider, tubeless rim profile and thru-axles.

  • SHIMANO GRX gravel wheelset
  • SHIMANO GRX gravel wheelset

WH-RX570-TL-F12/R12

  • Available in 700C and 650B sizes
  • Wider 21.6mm internal width rim accommodates wider tubeless tires
  • 12mm E-THRU axle design
  • Tested and developed to withstand the rigors of gravel
  • RX570 650B tubeless disc brake front wheel $197.99
  • RX570 700C tubeless disc brake front wheel $197.99
  • RX570 650B tubeless disc brake wheelset $419.99
  • RX570 700C tubeless disc brake wheelset $419.99
  • RX570 650B tubeless disc brake rear wheel $224.99
  • RX570 700C tubeless disc brake rear wheel $224.99
  • SHIMANO GRX Gravel Group
  • SHIMANO GRX Gravel Group

Unfortunately, not all the new GRX items will be available right away. Here is a quick breakdown of expected delivery times—July: Mechanical 1×11 and 2×11, August; Di2 1×11 and 2×11 September: Sub levers and dropper lever. For more on the Shimano GRX gravel line, visit gravel.shimano.com.

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