Mavic Crossmax SL Ultimate 25 29″ Boost Rear Wheel Wheel 29″ Boost Rear Wheel | Bike-Discount

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 1380 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 (360g) for fast acceleration and climbing without compromising stiffness and durability.

Lighter, stiffer and faster: with the Crossmax SL Ultimate 25 from Mavic

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 the 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 SL Ultimate 30 is available with 6-bolt or center lock brake rotors in 29” only and is compatible with a 15×110 front axle and 12×148 rear. It comes with valves, spare spokes and MTB wheel covers.

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Features – Mavic Crossmax SL Ultimate 25 UST Carbon 29″ Boost

• 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

Product features

• Use: MTB / Cross-country
  
• Model: Crossmax SL Ultimate 25
• Wheel size: 29″
• Rim type: Clincher
• Tubeless ready: Yes
• ETRTO: 622 x 25
• Freehub system: Instant Drive 360
• Axle system: 12 x 148 mm Boost (Thru Axle)
• Bearings: Auto adjust sealed cartridge bearings (QRM Auto)
• Rim inner width: 25 mm
• Valve hole: Presta / SV Ø 6.5 mm
• Spoke type: straight pull, flat, double butted
• Spokes: 24 (2-cross)
• Recommended tyre sizes: 50 mm to 76 mm (2.00″ to 3.00″)
• ASTM Catergory: 3 (for off-road use (“Cross-country”)
• Recommended system weight max: 150 kg (Rider + Bike + Equipment)

Free hub / brake mount (choose variant)

• Shimano HG / 6-Bolt
• SRAM XD / 6-Bolt
• Shimano Micro-Spline / Centerlock

Material

• Rim: Carbon
• Hub: Aluminum
• Freehub: Steel
• Spoke: Steel
• Nipples: Aluminium

Color

• black

Weight

• 735 g (manufacturer information)

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Scope of delivery

• 1 x Mavic Crossmax SL Ultimate 25 29″ Boost Rearwheel
• 1 x UST valve and accessories
• 1 x Multifonction adjustment wrench
• 1 x Tubeless rim tape
• 2 x Replacement spoke
• 1 x Wheelbag

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Technologies

Adaptive Layup Carbon technology
Lighter carbon rim construction for faster acceleration and more efficient climbing.The Ultimate CrossCountry racing application : light and responsive.

UST tubeless technology
Traction and control Universal Standard for Tubeless. Ready to ride tubeless system. The UST concept improves traction, control and comfort whilst reducing inertia and flats.

Instant Drive 360 freewheel technology
The new Instant Drive 360 freewheel system is super light and efficient. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile.

QRM Auto bearing preload technology
Qualité de Roulements Mavic Auto Our latest innovation. Those cartridge bearings are of course double sealed with C3 internal clearance. Their preload is automatically adjusted to guarantee a perfect spin with no play on the long run.