The ZEB Ultimate is a whole new breed of fork, designed to challenge the limits and take on the world’s toughest Enduro tracks. The Zeb Ultimate features an all-new stiff 38mm chassis designed with the Charger 3 damper, SKF Wiper Seals, and Maxima Plush Fluid. Rockshox's highest performing, athlete-proven technologies matched with premium style plays. Built for maximum performance, this MTB fork is equipped with 38mm aluminium upper tubes, magnesium lower legs and a forged, hollow aluminium crown for a perfect strength to weight ratio. Rockshox has also kitted out this model with a highly-tuneable air spring, which delivers an amazingly smooth feel off the top and maintains a higher ride height for increased confidence in steep terrain. Coming trail-ready with RockShox's highest performing Charger technology, this model also uses its Charger 3 RC2 damper to give you independent high and low-speed compression with rebound adjustment. Designed to reduce hand fatigue and fight unwanted friction, the Charger 3 damper increases confidence and control over every trail. Features 38mm chassis for increased stiffness and rider confidence. Updated highly tunable DebonAir™ air spring offers a buttery smooth feel off the top and maintains a higher ride height for increased confidence in steep terrain. Rockshox highest performing Charger technology. Charger 3 damper features independent high and low speed compression with rebound adjustment designed to reduce hand fatigue and fight unwanted friction, the Charger 3 damper increases confidence and control over every trail. Ultra-low friction SKF wiper seals provide long-lasting fork performance and improve overall suspension feel. Maxima Plush damping fluid reduces friction and silences damper noise. Specification Travel: 160 or 170mm. Axle: BOOST 15x110mm. Offset: 44mm or 51mm. Steerer Tube: Tapered. Wheel Size: 29". Max Rotor: 220mm. Weight: Approx. 2341g. E-Bike Approved. DebonAir air spring.