Description
Drop bar hoods work differently on gravel than they do on smooth pavement. When the surface roughens up, your hands naturally migrate forward and grip tighter, which changes the leverage angle on the brake lever and shifts your weight distribution on the controls. Shimano shaped the ST-RX810 hoods with a more pronounced slope that keeps your wrists in a neutral position during this forward grip, and the textured anti-slip surface on the brake lever blade itself maintains your purchase when sweat or rain would otherwise compromise your hold.
The hydraulic brake system pairs each shifter with a BR-RX810 flat mount caliper, arriving pre-bled with the hose already connected. The front lever comes with a 1000mm hose while the rear gets 1700mm, covering most gravel frame cable routing without cutting. Shimano’s SERVOWAVE technology manages the lever feel, with initial pad travel happening quickly to eliminate dead stroke, then the leverage ratio changes at pad contact to spread the remaining travel across the power application zone. You get modulation without the mushy feel that some hydraulic systems exhibit.
The calipers use ICE Technology with ceramic pistons and finned brake pads that dissipate heat on long descents where sustained braking would otherwise cause fade. The flat mount interface bolts directly to frames and forks designed for that standard, with the front caliper including an adapter for 140mm or 160mm rotors. The One-Way Bleed system simplifies maintenance when it’s eventually needed, and the easy hose joint design means you can swap hose lengths without special tools if your frame routing requires it…. Read More
Shifting uses the same internals found across Shimano’s 11-speed road lineup, with the front lever controlling the 2x front derailleur and the right lever handling the 11-speed rear. The shift action borrows from Shimano’s mountain bike mechanisms for durability, but the lever throw and effort match what you’d expect from Ultegra-level road components. One-finger shifts work reliably even when you’re bouncing over rough terrain and can’t dedicate full attention to the controls. Tool-adjustable reach lets you set the lever distance from the bar to accommodate different hand sizes or riding preferences, and the 18mm higher brake lever pivot axis compared to standard road levers changes the ergonomic relationship between your hand position and braking power.
The system works with any Shimano 11-speed road derailleur, so you can mix GRX levers with Ultegra or 105 derailleurs if you’re building from parts you already have. Each side is sold individually—left lever with front caliper, right lever with rear caliper—so you can replace a single side if needed or build up from scratch with exactly the hose lengths your frame requires.
