Shimano GRX 600 Disc

The budget version of the GRX disc brakes for 11x1 drivetrains, featuring a right-hand 11-speed shifter/brake lever and a left-hand brake lever without a shifter function.

Shimano GRX, the new gravel components designed for 11-speed drivetrains and cassettes up to 42 teeth. With the new 48/31-tooth crankset, 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 fast progress 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, from gear ratios and spacing, customisable ergonomics and integrated control of dropper seatposts right through to specific gravel wheelsets with wider rim profiles. Either the 11-speed road or 11-speed MTB cassettes can be used.

Shimano STI RX600 Disc Lever:

With the STI Disc brake lever ST-RX600, Shimano introduces a very compact brake lever 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, which ensure optimum grip even on the roughest terrain. These disc brake levers are based on 105 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 of 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 brake levers can be optimally adjusted to the rider via a reach adjustment and are also very well suited to riders with small hands. The new shift levers allow for significantly faster shifting. 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 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 BR-RX400 disc brake caliper:

The BR-RX400 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

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 Disc STI STBL-RX600 Brake Lever Technical Specifications:

• 1-speed
• Adjustable reach
• Effortless shifting; the release lever is now even easier to operate
• Short shift travel; the lever travel required for downshifting has been reduced by 10 mm
• SIS-SP41 shift cable housing: the silicone grease reduces the friction resistance of the cable housing by 10 per cent
• Includes inner cables
• Compatible oil: Shimano mineral oil, item no. Y83998010
• Recommended for bleeding: Item No. SMDISCBP
• Recommended brake calipers: BRRX810, BRRX400, BRR8070, BRRS785
• Weight: approx. 555 g

Shimano BRRX400 Flat Mount brake caliper Technical specifications:

• Aluminium brake caliper, flat mount installation
• 2-piston system
• Rensin L03A brake pads
• Recommended brake levers: STRX600, STR8020, STR785
• Weight: approx. 143 g
• Flat Mount standard
• Recommended brake hose: SM-BH-90-JK-SSR
• Recommended brake discs: Shimano IceTec SM-RT64, SM-RT800, SMRT67, SMRT66, SMRT86, SMRT81, SMRT99

Included in delivery:

Shimano GRX STI disc brake lever BLRX600, left, Shimano BRRX400 brake calipers, front wheel adapter, L03A brake pads, 100 cm brake hoses, oil not included

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