Shimano GRX BL-RX812 Right Hydraulic Sub Brake Lever — Effortless Control from the Tops for Unpredictable Terrain

The Shimano GRX BL-RX812 Right Hydraulic Sub Brake Lever redefines braking ergonomics for gravel and adventure cyclists by introducing intuitive control where it matters most — from the tops of your drop handlebars. Purpose-built as an auxiliary right-side lever, it empowers riders with instant access to hydraulic braking while climbing, cruising, or maneuvering through rough, technical terrain.

Crafted for Shimano’s acclaimed GRX series, the BL-RX812 integrates seamlessly with your existing hydraulic setup using mineral oil, ensuring fade-free performance and minimal maintenance even under the most grueling conditions. Its real strength lies in its ability to bring full hydraulic braking capability to unconventional hand positions, giving riders a decisive edge when descending or reacting to sudden terrain shifts — all without needing to reposition on the bars.

This sub lever is compact, unobtrusive, and perfectly tuned for one- or two-finger actuation. Its ergonomic blade design mirrors the natural curve of your hand, offering tactile feedback and controlled power modulation with minimal effort. Built to endure the punishing demands of gravel rides, it features a durable construction that resists trail abuse while maintaining a sleek, lightweight profile.

Whether you're tackling a multi-day adventure or a local gravel grinder, the BL-RX812 sub brake lever delivers the versatility and confidence needed to ride more aggressively and comfortably. When paired with GRX calipers, it completes a system that’s responsive, resilient, and absolutely trail-ready.

With the Shimano GRX BL-RX812 Right Hydraulic Sub Brake Lever, every hand position becomes a command center — unlocking a new dimension of ride control and redefining what's possible on gravel.