ATK TROFEO LIGHTWEIGHT BRAKE WORLD CUP Bindings

ATK Trofeo Lightweight Brake World Cup: Extremely Lightweight with an Integrated Brake for Competitive Ski Mountaineering

The ATK Trofeo Lightweight Brake World Cup ski touring binding is designed for ski mountaineering competitors and fast-paced ski tourers who refuse to compromise between lightness and reliability on the descent. Weighing just 140 grams per binding, it sets the technical standard in the category of ultra-lightweight systems with integrated brakes. Its design meets a specific need: to offer the responsiveness of a racing binding while incorporating a certified braking system, for use in both competitive settings and challenging mountain terrain. The ascent/descent tension is managed here by a unique flap mechanism, designed to smooth transitions without adding weight to the system.

Front stop: precise entry and optimized structural stiffness

ATK has incorporated two complementary technologies into the toe piece of this binding. MONOLINK TECHNOLOGY 1.0® features a fixed left-side toe piece arm, which reduces overall weight while increasing the assembly’s lateral stiffness—a direct advantage during descents on technical terrain, where force transmission must be immediate and play-free. The EASY ENTRY SYSTEM® optimizes the geometry of the front toe piece to facilitate the insertion of tech inserts into the jaws, even when wearing thick gloves or in harsh winter conditions. The ROLLING-IN SYSTEM® complements this feature with a U-shaped spring equipped with rotating rings, which makes putting on the boot smoother and improves the long-term durability of the contact points.

Heel piece and ascent/descent transition: a single flap to control everything

The heel piece of the ATK Trofeo Lightweight Brake World Cup features a streamlined design: a single heel flap simultaneously manages the transition from ascent to descent mode and the brake position. This design choice reduces the number of adjustments needed during races or in alpine conditions and minimizes potential sources of mechanical failure. The system does not offer a flat mode, reflecting this binding’s focus on pure performance. In downhill mode, the heel locks onto the inserts of an ISO 9523-compatible boot, ensuring direct sole contact and power transmission without any unnecessary intermediaries.

Integrated brake: ISMF-certified and automatically activated

The integration of a brake into a binding in this weight class is the key distinguishing feature of this model. The NEW SKI BRAKE RACE system is automatically activated by the movement of the heel during release, without any additional action required. This feature is approved by the ISMF (International Ski Mountaineering Federation), making it eligible for use in official competition. The brake is available in several widths—70, 86, 91, 97, 102, 108, and 120 mm—to precisely match the waist width of the ski being used. This range covers everything from narrow competition skis to medium-width touring skis.

Compatibility and Recommended Use

The binding is designed for boots with tech inserts (ISO 9523), the universal standard for ski mountaineering bindings. It is recommended for use with skis whose waist width is between 60 and 70 mm, with a ski weight of less than 800 g. The recommended user weight range is between 40 and 60 kg, making this model ideal for lightweight, agile skiers—typical of competitive ski mountaineering. An optional crampon mount is compatible with this binding, allowing for outings on hard snow or ice without the need for bulky additional gear.

Materials: 7075 aluminum, titanium, and stainless steel

The construction of the ATK Trofeo Lightweight Brake World Cup relies on a selection of materials with high specific strength. 7075 aluminum, used in aerospace for its strength-to-weight ratio, forms the structural basis of the main components. The U-shaped spring is made of titanium to combine elasticity, lightness, and resistance to cyclic fatigue. Stainless steel is used in contact areas subject to wear, while POM (polyoxymethylene) provides sliding and damping functions at the mechanical interfaces. This combination of materials accounts for the advertised weight of 140 g per binding without compromising on durability.

Designed for competitive ski mountaineers and fast-paced backcountry skiers tackling challenging routes, the ATK Trofeo Lightweight Brake World Cup combines, in an ultralight design, a certified brake, an easy-entry toe piece, and a single-action heel piece. It is a ski touring binding designed for those seeking to minimize every gram on the ascent without sacrificing safety or power transfer on the descent.