Built for Olympic athletes, the new Crossmax SL Ultimate is the most dynamic XC wheelset ever created by Mavic. Lighter, stiffer, faster—it’s all about going for gold.

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 29” rim (340g) 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 our new UD² construction for a distinctive look and added durability.

Extensive field testing with our 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. Our 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.

The Crossmax SL Ultimate 25 is available with 6-bolt brake rotors in 29” only and is compatible with a 15x110 front axle and 12x148 rear. It comes with valves, spare spokes and MTB wheel covers.

MAIN FEATURES

Fly up climbs and accelerate faster
New carbon Adaptive layup technology shaves 70g per rim. 25mm wide rim weighs only 340g.

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.

SPECIFICATIONS

Weight
Weight Pair : 1355 g
Weight Front : 615 g
Weight Rear : 740 g

Rims
Material: 100% carbon fiber with UD external layer
Height: 25 mm
Internal width: 25 mm
Drilling: traditional (front/rear 24 holes)
Braking: disc
Profile: asymmetrical and hookless
ETRTO size: 622x25TSS
Tire: UST Tubeless Ready - Use with Mavic Tubeless Tape

Spokes
Material: steel
Shape: straight, extra-flat, constricted, antirot (front and rear)
Nipples: aluminium, black
Lacing: crossed 2 (front and rear)

Hubs
Body material: aluminium
Body design: INFINITY
Disc standard : 6 Bolts only
Axle material: aluminum
Axle size: front 15x110 / rear 12x148
Freewheel technology: Instant Drive 360
Freewheel: Sram XD MTB
Bearing technology: QRM automatic setting - sealed cartridge

Compatibility
Freewheel body: convertible SHIMANO MS (kit V3990101 sold separately)
Freewheel body: convertible SHIMANO HG MTB aluminium (kit V3780101 sold separately)
Freewheel body: convertible SHIMANO HG MTB steel (kit V3790101 sold separately)
Front axle adapters: 15x110 convertible to 9x110 (kit 99694101 sold separetly)
Front axle adapters: convertible to 15x31mm with Torque Cap (kit V2374401 sold separetly)
Rear axle adapters: 12x148 convertible to 9x141 (kit V2510801 sold separetly)

Delivered with
User guide
Wheel cover
Rim tape mounted on wheel
UST valve not mounted on wheel
2 replacement spokes with each wheel
Multifonction adjustment wrench with the rear wheel

Intended use
Minimum tyre size: width 30mm - pressure max. 4.05Bar/59PSI
Maximum tyre size: width 64mm - pressure max. 2.45Bar/36PSI
ASTM category 3 : cross country
Maximum weight supported by the wheels: must not exceed 150 Kg (bike weight included)