PiggyBack™ Reservoir – The brake fluid reservoir on SRAM’s latest lever design is optimized for both performance and ease of use. The PiggyBack Reservoir offers a simple, failsafe way to manage brake fluid, and also allows for ambidextrous lever placement—so you can switch your levers on the handlebar and run them moto without hassle.

Heat Shield – The stainless steel heat shields breaks the thermal connection between the pad and caliper body, reducing caliper fluid temperature by about 20C even in the most extreme testing conditions.

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.

DirectLink™ – SRAM's DirectLink lever design produces a solid, positive feel the second you squeeze the lever to engage the brake. It offers a no-nonsense solution to give you precise control.

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.

Blade Material – Forged Aluminum

Brake Lever Actuation – Hydraulic

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.

Code Caliper – Designed for heavy-duty demands, this four piston caliper is easy to install and comes with metallic pads.

Fluid – DOT 5.1