Bleeding Edge™ – New bleed porting and fluid path make it easier to push fluid through the caliper for quick and easy bleeding, dedicated bleed adapter for the S4 caliper plugs into the bleed port and seals the system to minimize air contamination and fluid loss.

Timing Port Closure – A hydraulic brake’s timing port is the connection between the reservoir and the master cylinder bore. When the lever is squeezed, a cup seal passes this area and closes the port, which pressurizes the system. SRAM’s new timing port closure system features durable seals and an ultra-smooth cylinder bore finish, producing dependable braking power and consistency.

Power Reserve Geometry – These levers were designed with the lowest X Factor (the distance from the center of the handlebar to the center of the lever's pivot) for a reduced inward travel. This creates an arc that's closer to your fingers' natural motion, delivering more power to the lever.

SwingLink™ – Squeeze a new SRAM brake lever and you notice it immediately. Less deadband. More positive pad engagement. A new cam system requires less lever throw to push the pads toward the rotor. That's great but there's more to perfect braking performance than just power. You need control. Many brake systems minimize deadband -- but at the cost of modulation. SwingLink™ solves that with its special cam shape. When the pads contact the rotor, power is modulated, avoiding that "on/off" brake feel. It's the perfect balance of power and precision.

Reach Adjust – Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone.

Lever Pivot Bearings – Precision sealed bearings at the lever point enhance the clean, crisp lever actuation and consistent, light, one-finger feel.

Contact Point Adjustment – Pick the position you want your fingers to be in when your brakes are engaged. This is a quick and easy way to customize the feel fo your brakes without having to move your pads, and to balance the levers to feel exactly the same.

S4 Lightweight 4-Piston Caliper – This all new S4 Caliper features four machined and moly-coated aluminum pistons for consistent rollback and easy setup.