Disc brake front SRAM G2 Ultimate hydraulic black-rainbow

More caliper stiffness and a pad compound with bite.

Pivot bearings for crisp lever feel and a fatigue-free ride.

SRAM's best power to weight ratio in a four-piston brake.

TECHNOLOGIES

Bleeding Edge - With this caliper fluid circuitry, the bleed port has been moved to the bottom of the caliper, and all four piston bores can communicate. This way, during bleeding fluid naturally fills the caliper, resulting in an easier, more consistent bleed.

Contact Point Adjustment - Some people like the instanteneous power of a short lever throw. Others prefer the feel of a longer throw. With Contact Point Adjust, you can pick the position you want your fingers to be in when your brakes are engaged. It's a quick and easy way to customize the feel of your brakes without having to move the pads. It's also a way to balance both brake levers to feel exactly the same.

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

Power Reserve Geometry - Your fingers pull in a straight line, but brake levers move in an arc. Bottom line: Your fingers typically want to slip off the ends of the levers as you pull. We designed all of our brakes with the industry's lowest X Factor (that's the distance from the center of the handlebar to the center of lever's pivot). That reduces the lever's inward travel, creating an arc that's closer to your fingers' natural motion and more power is delivered to the brake lever. And, the cool part is, every SRAM and Avid brake lever has it.

S4 light-weight 4-piston caliper - The all S4 Caliper features four Machined and Moly-coated aluminum pistons for consistent rollback and easy set-up, Heat shield insulation and Bleeding Edge porting and adapter technology for easy bleeds.

SwingLink - Squeeze a SRAM brake lever and you notice it immediately. Less deadband. More positive engagement. A cam system requires less lever throw to push the pads toward the rotor. That's great, but there's more 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, the leverage rate curve is flat and smooth, avoiding that "on/off" brake feel. It's the perfect balance of power and precision.

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