The SRAM Guide line of brakes really are the next level, and the Ultimate is SRAM's latest top of the line offering. The Ultimate pairs carbon fiber levers and titanium hardware with its all new S4 4 piston Caliper. This combination means pro level XC race weight with motorcycle stopping power. Whereas the more basic Guide R brake relies on the proven DirectLink lever design, the RS, RSC, and Ultimate models step it up with SwingLink. SwingLink utilizes a specially shaped cam that not only requires less travel and force to produce proportional amounts of pressure, it minimizes the deadspot of lever travel. Paired with the new cup seal timing port closure system, this means that you receive perfect modulation immediately. Once the lever is squeezed, a cup seal swiftly passes this area and closes the port, pressurizing the system and forcing the pads to the rotor. The Ultimate's contact point adjustment feature is found just behind the lever attachment to the master cylinder, making it quick and convenient to dial in the brake's feel. The caliper paired with the Guide Ultimate is the powerful new 4 piston S4 model, and it comes with SRAM's steel backed Trail pads for incredible stopping power. The forged aluminum construction means long term durability and ease of pad removal via the top loading design. Another feature exclusive to the Guide Ultimate brake is SRAM's Bleeding Edge technology, which makes your brake bleeds easier and more effective. In the past, SRAM's brakes have been notoriously difficult to bleed properly. Bleeding Edge does away with these bleed woes with new bleed porting and a new fluid path that make it easier to push fluid through the caliper. The dedicated bleed adapter for the S4 caliper plugs into the bleed port and seals the system to minimize air contamination and fluid loss. The SRAM Guide Ultimate Disc Brake comes as a Frontleft or Rearright lever and caliper configuration, with the package completing Centerline Rotor sold sepa...