The SPX 12 ROCKERFLEX binding is all new! Featuring a smaller mounting zone and partially suspended heelpiece, allowing enhanced ski flex and control. Combined with reinforced Pivot toe, the SPX Rockerflex has one of the strongest coupling strengths (boot-to-binding interface) allowing maximum power transmission, precision, and control. Featuring the longest elastic travel on the market, SPX bindings a substantial reduction in weight, reduced ramp angles for a more neutral, upright stance, and improved step-in/step-out functionality, the SPX offers less fatiguing, more user-friendly alpine performance. The race-specific Rockerflex bridge neutralises pressure between toe and heel, delivering the most natural ski flex. The SPX 12 ROCKERFLEX is designed for use with R21 WC and R21 Racing plates.