Mavic Crossmax Carbon SL Ultimate 25 - 29" Boost Rear 2024

At only 1340 grams, Mavic Crossmax Carbon SL Ultimate 25 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 Mavic 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 Carbon 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.

Rim

• Material: 100% carbon fiber with UD² external layer
• Tire: UST Tubeless and tubetype
• Internal width: 25 mm
• Hookless design
• ETRTO size 29": 622x25TSS
• Asymmetrical rim design
• Rim Custom Decal kit available separately

Spokes

• Material: steel
• Shape: straight pull, flat, double butted
• Nipples: Aluminum ABS
• Count: 24
• Lacing: crossed 2, contactless

Hub

• Hub available with 6-bolt brake rotors
• Axle : 12x148 Boost
• 24 teeth ratchet
• Instant Drive 360
• QRM Auto
• Freehub options
    - Standard Aluminum (Shimano-Sunrace 9-10-11S / Sram 9-10S, NX 11S and NX Eagle 12S)
    - XD (Sram 11S and 12S / E13 10S and 11S)
    - Microspline ( Shimano 12S)

Use : 

• ASTM CATEGORY 3 : CROSS COUNTRY
• Recommended tyre sizes: 28mm to 64mm (1.10" to 2.50")
• For a longer longevity of the wheel, Mavic recommends that the total weight supported by the wheels doesn't exceed 150kg, Ebike included

Technologies

• QRM Auto (cartridge bearing with double sealed with C3 internal clearance)

Warranty

• 2 years
• Can be extended to lifetime warranty by registring in the Mavic Care Program (max 2 month after the purchase)

Comes with

• UST valve and accessories
• 2 replacement spokes with each wheel

Mavic weight : 735 gr