Shimano built the BL-RX600 for riders running 1x drivetrains who no longer need a front derailleur lever but still want the GRX ergonomics and hydraulic braking performance on their left side. Before GRX, you either ran a Dual Control lever with a dead shifter or cobbled together a solution from other components. The BL-RX600 solves that problem with purpose-built simplicity: a left-side brake lever matched to GRX's gravel-specific hood and lever shape, ready to pair with Shimano's flat mount hydraulic calipers.

The lever body shares the same ergonomic profile as the shifting levers in the GRX family. The hood head sits slightly raised compared to road levers, which prevents your hands from sliding forward when you hit rough terrain or transition from the tops to the hoods. That raised position also gives you a more natural wrist angle during extended time in the saddle. The brake lever itself features an anti-slip texture that maintains grip when conditions get wet or your gloves are soaked through.

Reach adjustment lets you position the lever blade closer to or farther from the handlebar to match your hand size and preferences. This is a tooled adjustment rather than a quick dial, so you set it once during setup and forget about it. The hydraulic system uses Servo Wave technology, which provides progressive lever feel with strong initial bite and consistent modulation as you apply more pressure. Free stroke adjustment lets you fine-tune how much lever travel occurs before the pads contact the rotor.... Read More