Shimano GRX 810 groupset

The top-of-the-range GRX groupset, based on Shimano Ultegra technology, for 11-speed drivetrains with an 11-speed shift-brake leverand a left-hand brake lever without a shift function, featuringthe GRX 810 rear derailleur for 11-30 to 11-34 tooth cassettes

Shimano GRX, the new gravel components designed for 11-speed drivetrains and cassettes up to 42 teeth. With the new 48/31-tooth crankset or single-chainring cranksets featuring 40- or 42-tooth chainrings, the GRX components offer a wide gear range for a variety of applications, from gravel and cyclocross to touring. Shimano GRX, the first gravel-specific component family designed equally for speed and safe bike handling on loose surfaces, is the result of an intensive and extensive research, testing and development process that incorporated information and feedback from countless riders who are out and about on trails, forest tracks, gravel roads or tarmac. Whether it’s gravel riding in the strictest sense, road bike adventures off-road, bikepacking, commuting or the demands of competitive cyclocross riders: Shimano’s GRX components offer countless options that leave nothing to be desired in terms of gear ratios and spacing, customisable ergonomics, integrated control of dropper seatposts, right through to specific gravel wheelsets with wider rim profiles. Either 11-speed road or 11-speed MTB cassettes can be used. Gear ratios ranging from 11-30 teeth to 11-42 teeth are available

Shimano GRX Rear Derailleur RD-RX810:

The Shimano RD-RX810 is designed for 11x2-speed and single-speed drivetrains with a maximum cassette size of 34 teeth. The GRX rear derailleurs are characterised by quiet, smooth, precise and reliable shifting, even on the most demanding terrain, thanks primarily to the chain stabilisation system known as Shadow RD+. The new GRX rear derailleurs now feature the Shimano Shadow RD+ stabiliser mechanism, which stabilises the chain particularly on rough, uneven surfaces. As with Shimano mountain bike rear derailleurs, the switch for this Shadow RD+ friction damper is located on the top of the rear derailleur body. In the ‘On’ position, the forward and backward movement of the derailleur cage is extremely strongly dampened, thereby reducing chain slap and the risk of the chain coming off or mis-shifting, as well as noise levels.

Shimano STI ST RX810 Disc Shift-Brake Lever:

The 11-speed STI Disc ST-RX810 shift-brake lever is a very compact shift-brake lever designed for hydraulic disc brakes and mechanical shifting systems. Ergonomics specially adapted for gravel use are characterised by a brake lever pivot point raised by 18 mm, a curved lever shape and non-slip textures on the contact surfaces, ensuring optimum grip even on the roughest terrain. These disc brake levers are based on Ultegra STI technology and are compatible with Shimano’s mechanical Dura-Ace 9000, Ultegra 7000 and 105 7000 11-speed groupsets. Shimano’s engineers have succeeded in integrating a mineral oil cylinder, including a complete braking system, into these nevertheless very compact mechanical shift-brake levers. The brake levers are made from aluminium; this technology guarantees maximum stiffness, durability and a robust design. Thanks to the improved positioning of the brake cable, a smooth braking action is achieved, leading to optimised control in extreme conditions. The Dual Control shift/brake levers can be optimally adjusted to the rider via a grip width adjustment and are also very well suited for riders with small hands. Shifting can be done much faster with the new shift levers. This is achieved through a 20 per cent shorter cable. The grips feature an ergonomic design for greater comfort – even over long distances. The GRX STI levers can be combined with the BLRX812 auxiliary brake levers. These are mounted between the shift levers and the brake on the top tube, just like classic cross-country brake levers. This ensures full control over the bike in every riding situation.

Shimano BL-RX810 Disc Brake Levers:

With the BL-RX810 disc brake lever, Shimano offers a very compact brake lever for hydraulic disc brakes and 11x1 drivetrains. The left lever has no shifting function. Ergonomics specially adapted for gravel riding are characterised by a brake lever pivot point raised by 18 mm, a curved lever shape and non-slip textures on the contact surfaces, ensuring optimum grip even on the roughest terrain. These disc brake levers are based on the technology of the Ultegra series, but without the shifting mechanism. Shimano’s engineers have succeeded in integrating a mineral oil cylinder, including the complete braking system, into these disc brake levers, which remain very compact. The brake levers are made of aluminium; this technology guarantees maximum stiffness, durability and a robust design. The GRX brake levers can also be combined with the BLRX812 auxiliary brake levers. These are mounted on the top tube between the shift levers and the brake, just like classic cross-country brake levers. This ensures full control over the bike in every riding situation.

Shimano BR-RX810 disc brake caliper:

The BR-RX810 road bike disc brake caliper is torsion-resistant and approved for brake discs up to 160 mm. Equipped with brake pads featuring external cooling fins, brake heat is reliably dissipated. These calipers are compatible with all Shimano disc brake levers. Recommended brake discs: SM-RT800, SM-RT86

Flat Mount Standard:

The new Flat Mount caliper standard for road bike brakes reduces weight and offers a significantly sleeker look. With the Flat Mount Standard, the rear brake caliper sits directly on the chainstay; no adapter is required for caliper mounting. The bolts pass through the chainstay from below directly into the brake caliper. A flat adapter is still required on the fork. The adapter is screwed onto the rear of the fork leg, with the brake sitting directly on the adapter.

Shimano GRX FC-RX810 crankset:

The GRX cranksets have been developed to handle a wide variety of terrain and riding styles. All versions feature a 2.5 mm wider chainline, which creates more clearance in the frame design and allows for wider tyres. The GRX single-chainring cranksets minimise shifting complexity by requiring shifting only at the rear cassette, with optional RX800/600 40T cassettes or RX800 42T cassette, and are equipped with chainrings featuring Shimano’s Dynamic Chain Engagement+ tooth profile, which ensures optimal chain retention, particularly on rough terrain.

Hollow-forged chainrings, hollow-forged, extra-sturdy crank arms and a reduced outer surface area bring the weight of the new GRX FC RX 810 crankset down to 722 grams. The design of the 2x11-speed Hollowtech II crankset not only boasts a look and aesthetic with cult potential, but also ensures enhanced performance. A wider, yet lighter than the previous model, crank arm and the large chainrings with Hollowglide technology increase stiffness and optimise power transfer to the pedal.

Optional bottom bracket:

Modern frames now feature a wide variety of bottom bracket shells. Shimano only offers compatible bottom brackets for some of these. To ensure the GRX groupset fits all frames, we supply optional FSA or Wheels MFG bottom brackets for the bottom bracket shells for which Shimano does not offer bottom brackets. A list of available bottom brackets and installation dimensions can be found below.

Shimano CS-HG701 chain

The Shimano 11-speed chain with SIL-TEC surface coating for ultra-low friction and improved wear resistance thanks to chrome-plated pins. The milled inner plates also reduce weight. Available with a locking link or rivet pin.

Shimano Ultegra Cassette:

With 11-30, 11-32 or 11-34-tooth configurations, these cassettes offer a well-spaced gear range for sporty riding when paired with GXR components.

Scope of delivery Shimano GRX 810 groupset:

• Shimano GRX rear derailleur, RD RX810
• Shimano GRX STI, Dual Control Disc brake-shifter lever, 11-speed, ST RX800
• Shimano GRX disc brake lever, BL RX800
• Optional brake lever with mechanism for dropper seatposts
• Shimano GRX disc brake calipers BR RX810, flat mount
• Front wheel adapter, fixing bolts
• Shimano GRX crankset FC R 810, available in three lengths and two sprocket sizes
• Optional Shimano or Wheels bottom bracket
• Optional Shimano Ultegra cassettes, in gear ratios from 11-30 to 11-42 teeth
• Shimano chain, CN HG701
• Shimano shift cables
• Shimano disc brake hoses 100 and 170 cm, SM-BH-90-JK-SSR
• without oil

Compatible bottom bracket shells - bottom brackets

There is now a wide variety of bottom bracket shells on modern frames. Shimano only offers compatible bottom brackets for some of these. To ensure the GRX groupset fits all frames, we supply optional FSA or Wheels MFG bottom brackets for the bottom bracket shells for which Shimano does not offer bottom brackets. Wheels Outboard bottom brackets are significantly more durable than standard press-fit bearings, as the cup halves are bolted together, ensuring they sit flat and securely within the frame. Wheels bearings are available in various quality grades: ABEC3 standard bearings, angular contact bearings and ceramic bearings.

• BSA threaded housing, installation width 68 mm
  Shimano Dura Ace SM-BBR60B bottom bracket
• Housing: ITA thread, installation width 70 mm
  Bottom bracket: Shimano Dura Ace SM-BBR60I
• Pressfit BB86 housing, installation width 86.5 mm, press-fit depth 41 mm
  Shimano SM-BB71-41B bottom bracket or
  Wheels MFG Outboard BB86-OUT bottom bracket
• BB30 shell, installation width 68 mm, press-fit depth 42 mm
  Wheels MFG Outboard BB30-OUT bottom bracket
• BB30A shell: press-fit depth 42 mm, bottom bracket width 73 mm asymmetrical,
  Wheels Outboard bottom bracket, item no.: BB30A-OUT-SHIM
• Pressfit 30 housing, installation width 68 mm, press-fit dimension 46 mm
  Wheels MFG Outboard PF30-OUT bottom bracket
• Pressfit 30A shell: Press fit diameter 46 mm, bottom bracket width 73 mm (asymmetrical)
  Wheels Outboard bottom bracket, item no.: PF30A-OUT-SHIM
• BBRight shell, installation width 79 mm, press-fit dimension 46 mm
  Wheels MFG Outboard BBRIGHT-OUT bottom bracket
• BB386 shell, installation width 86.5 mm, press fit 46 mm
  Wheels MFG Outboard bottom bracket 386EVO + 386EVO-SHI
• BB90 shell, installation width 90 mm, press-fit dimension 41 mm
  FSA 230-600 bottom bracket
• T47 thread: M47x1, bottom bracket width 68–132 mm, compatible bottom brackets:
  Wheels Outboard Item No.: T47-BB-SHIM-AC

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com