Mavic Crossmax SL Ultimate 25 Boost Carbon Wheelset - 29" - Black 15x110 Front - 148x12 Rear Sram XD Drive 6 Bolt Pair 12 Speed Tubeless 29"

At only 1340 grams, this is the wheel that performance-obsessed cross-country racers dream of. Developed with input from top pro racers seeking a competitive advantage at World Cups and Olympics, it features an ultralight full carbon rim for fast acceleration and climbing without compromising stiffness and durability.   Adaptive layup, a specific carbon layup technology enabled us to handcraft these carbon rims with less material between the spokes. The spoke holes are reinforced with strategically positioned carbon layering in a process that minimizes weight without compromising stiffness and strength. A lighter rim means faster acceleration, more efficient climbing, and a more responsive feel on the trail. The external carbon layer features Mavic's new UD² construction for a distinctive look and added durability.   Extensive field testing with Mavic's pro athletes determined that a 25mm inner width was ideal for a quick, precise ride quality and optimized tire grip on fast racetracks. For more technical trails, some preferred a 30mm width for added control, so we created two options. It’s your choice, and you can mix the two if you want. You could choose the Crossmax Ultimate 25 for the rear to boost acceleration and efficiency, and the Crossmax Ultimate 30 for the front to add confidence and control on rugged single-track.   The carbon rim is laced with 24 straight-pull double butted spokes (same spoke length throughout), two-crossed for maximum power transfer and enhanced vertical compliance. The new lighter Infinity hub design optimizes lateral stiffness, and the spoke lacing maximizes power transfer. Mavic Instant Drive 360 freewheel with a double ratchet system provides fast engagement and high stiffness to help you accelerate out of corners faster. The rear hub is compatible with Shimano HG9, Micro Spline and SRAM XD driver bodies.   Fly up climbs and accelerate faster New carbon Adaptive layup technology shaves 70g per rim.   Stiff and smooth ride quality Special carbon rim layup for superior rim stiffness and added control on descent. Double-butted, two-cross spoke pattern for enhanced vertical compliance.   Efficient power transfer New lighter Infinity hub design paired with 24 straight-pull spokes for improved stiffness and better balanced spoke tension.   Rims Rim: 100% carbon fibre with UD external layer - 29". Braking Surface: Disc. Height: 25mm. Internal Width: 30mm.   Hubs Front Axle: Infinity 15x110mm . Rear Axle: Infinity  148x12mm. Freehub: Sram XD. Disc Mount: 6-Bolt.   Spokes Spokes: Straight-pull. Count 24 Front & Rear.   Other Weight: Front 615g / Rear 740g. Max Tyre Width: 30mm To 64mm. Max Pressure: 59 PSI . Maximum weight supported by the wheels: must not exceed 150 Kg (bike weight included).