The G2 Ultimate is SRAM's flagship trail brake, sitting above the RSC in the G2 lineup and slotting in as the four-piston option between the XC-focused Level and the DH-oriented Code. SRAM describes the G2 as a mini-Code, with the G2 sitting more towards the trail end of the market while the Level brake is aimed at the XC market. If you're building a trail or light enduro bike and want the lightest four-piston brake SRAM makes without stepping up to the heavier Code, this is where you land.

The G2 continues to use the SwingLink cam and the same leverage rate as the Guide and Code, but the caliper is completely new and much stiffer than the Guide's for improved power transfer. SRAM claims a 7 percent increase in power over the Guide brake. The S4 caliper runs four machined, moly-coated aluminum pistons in a dual-diameter arrangement, which gives the lever the progressive feel that SRAM brakes are known for — firm at the bar without the abrupt initial bite of a Shimano-style system.

What separates the Ultimate from the RSC below it is where SRAM spent the money. You get a carbon lever blade rotating on a sealed pivot bearing instead of a bushing, titanium hardware throughout, and the same tool-free reach and contact point adjustment dials found on the RSC. The pivot bearing is the difference you feel — the lever pull stays crisp even after long descents where a bushing-based lever can start to feel vague.... Read More