SRAM isn’t mincing words when it comes to naming the top end version of the Guide brake, but it’s done more than throw exotic materials at the existing item. SRAM claims that the top Guide can cope with more braking heat and has a more consistent feel that ever before. Our experience on the trail would bear that out.
The changes themselves may seem small, but they all add up. Rather than the completely resin phenolic pistons used by the regular Guides, the Ultimate pistons use an alloy sleeve around a phenolic core. Tighter tolerances and a special finish means that they receive more lubrication from the DOT brake fluid. This helps them move more freely and ensures they retract properly each time, keeping lever feel consistent.
Other upgrades include more flexible seals, a wider caliper-channel for improved airflow and an alloy heat shield that helps reduce heat transfer from the pad to the hose side of the caliper. SRAM claim these help reduce the caliper’s running temperature by as much as 20°C when compared to the standard Guide. A carbon lever blade and titanium bolts are thrown in for good measure to up the bling and drop the weight. Our set weighed in at a respectable 830g for the pair including 180mm diameter ‘Centreline’ two-piece rotors.
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The lever throw is short and the bite point fantastically predictable
SRAM’s Matchmaker clamp allows the brakes to sync with a Reverb seatpost and SRAM shifters too. It’s a neat system, especially as the shifter can be moved vertically or laterally on the handlebar to suit your personal preference. The bite point dial does its job, but is a little stiff to use, and some testers found the reach adjuster fiddly too.
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