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With its completely new, 4-piston S4 caliper, SwingLink™ lever cam, and carbon lever blade, the 360-gram Guide Ultimate stands alone as the new leader in its class. It has been engineered to be light and powerful, with superior heat management capabilities, which give you better, more consistent, more reliable braking. The new caliper design also incorporates a re-designed seal and aluminum piston interface for ease of setup and improved consistency, while Bleeding Edge™ technology makes bleeding Guide Ultimate a quick and easy task.
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Specifications for Guide Ultimate
|Caliper Design||S4 Caliper|
|Finish||Arctic Grey Ano, Black Ano|
|Rotor||CenterLine or CenterLine X|
|Adjustment||Tool-free Contact Point, Reach Adjust|
|Special Features||Piggyback Reservoir, MatchMaker™ X compatible, Titanium hardware|
|Technology Highlight(s)||SwingLink™, Expandable Bladder, Timing Port Closure, Lever Pivot Bearings, Bleeding Edge™, Heat Shield|
|Pad / Holder||Top-loading|
|Rotor Sizes||140, 160, 170, 180, 200mm|
|Tri-Align Caliper Positioning System||No|
|Tool-Free Pad Replacement||Yes|
|Other||Requires Bleeding Edge™ bleed adapter|
|Retail Availability||December 2014|
- Bleeding Edge
Bleeding Edge™ technology makes bleeding brakes quick and simple. An updated fluid path and bleed porting make it easier to push fluid through the caliper. A dedicated bleed adapter plugs into the bleed port and seals the system to minimize air contamination and fluid loss.
- Contact Point Adjustment™
Some people like the instantaneous 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.
- DOT 5.1™
Heat is an enemy of any brake system, so advancements in heat management mean advancements in your ride. We found that in our systems DOT 5.1 takes almost three times longer to boil than DOT 4, thus allowing flawless, fade-free performance in even more extreme conditions.
- 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.
- Lever Pivot Bearings
Precision sealed bearings at the lever pivot enhance the clean, crisp lever actuation and consistent, light, one-finger feel.
- MatchMaker and MMX Compatible
Save weight and clutter on the bar with Matchmaker. It holds Avid levers, SRAM® triggers, and various RockShox® controls, all with one tidy, light, clamp--a dream come true for handlebar component footprint conservationists the world over. Available in two versions: Matchmaker™ X integrates the RockShox®XLoc and is compatible with XX and X0 brakes. Standard Matchmaker™is also available and works with any split-clamp design and RockShox® PushLoc.
- 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.
- Reach Adjust
Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone.
Squeeze a new SRAM brake lever and you notice it immediately. Less deadband. More positive pad engagement. A new cam system requires less lever throw to push the pads toward the rotor. That’s great, but there’s more to 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, power is modulated, 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 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.
Documents Available for Guide Ultimate
SRAM Guide Ultimate receives 2015 BikeRadar Gear of the Year award.
"The Guide Ultimate serves up an impressive range of modulation and has never left me wanting for more stopping power."
"The new SRAM Guide Ultimates may look like the rest of the Guide range, but they have been heavily reworked. The new Guide Ultimates feature titanium mounting hardware and a carbon lever, but the main changes are inside the new S4 caliper. New aluminum pistons, a stainless steel heat shield, and increased airflow through the caliper body help control heat buildup; new Bleeding Edge porting and a Lossless adaptor makes bleeding effortless. The Guide Ultimates are the pinnacle of SRAM’s braking technology."
A video project diving deep into the history of the Avid and SRAM brakes started almost a year ago with BIKE Magazine. The BLUEPRINT video series on BIKE Magazine focuses on past and present developments that bring a certain product technologies to success, providing a unique and candid look at the make-up of a component.
BIKE Magazine gear editors Ryan Palmer and Vernon Felton concluded the new SRAM Guide brake line up to be one of the most consistent, reliable and highest performing brakes they have ever ridden.
"The Guide Ultimates still delivered their power effectively and were easy to modulate, even with tired hands."
"They take the win in this group test for their exceptional performance and bleeding technology."