Juego de ruedas Mavic Crossmax SL Ultimate 30 29

The Mavic Crossmax SL Ultimate 30 29 Wheelset is Mavic's highest expression of cross-country wheel engineering — a full-carbon tubeless set that weighs in under 1,400 g for the pair and carries none of the compromises that usually come with building light. You notice the weight the moment you lift the bike. You feel the stiffness the first time you sprint out of a switchback. And on a long day of technical singletrack, you stop noticing the wheels at all — which is exactly the point.

The rim design is worth understanding. A 30 mm internal width is generous for an XC-specific wheelset, and that's deliberate. Wider internal dimensions allow a modern XC tire to assume a rounder, more supported profile — the kind that corners predictably and absorbs chunk without folding underfoot. The asymmetric hookless bead works directly with Mavic's UST tubeless architecture, which has been refined over decades into something that actually works without ceremony. Seat the bead, add sealant, ride. The system is designed to hold pressure reliably across the kind of variations a race day or a long backcountry loop will throw at it.

Inside the hubs, Mavic's Instant Drive 360 engagement system is the mechanism that makes this wheelset feel alive under power. The near-zero engagement gap between pedal stroke and forward drive matters most where the terrain is steep, loose, and unforgiving — the precise moments when a dead spot in the drivetrain costs you traction or momentum. Boost axle spacing throughout — 15×110 mm front, 12×148 mm rear — provides the lateral stiffness that a light carbon rim needs to stay honest under hard cornering loads. Available in XD Driver and Microspline freehub options, the Crossmax SL Ultimate 30 is compatible with the full range of current 12-speed drivetrains.

Mavic Crossmax SL Ultimate 30 Specs at a Glance

• Wheel Size: 29-inch
• Weight (Pair): Under 1,400 g (approximately 635 g front / 760 g rear)
• Rim Material: Full carbon
• Internal Width: 30 mm
• Bead Type: Hookless, asymmetric profile
• Tubeless Compatibility: UST tubeless-ready
• Engagement System: Instant Drive 360
• Front Axle: 15×110 mm (Boost)
• Rear Axle: 12×148 mm (Boost)
• Freehub Options: XD Driver or Microspline
• Rotor Mount: 6-Bolt or CenterLock (variant dependent)
• Intended Use: Cross-country and marathon racing, technical singletrack

Design Benefits

1. Carbon Construction at Race Weight: The full-carbon rim and hub shells allow Mavic to reach sub-1,400 g without sacrificing the structural integrity a technical XC course demands. Rotational weight reduction at this level translates directly into faster acceleration out of corners and reduced fatigue across long race distances — the kind of gains that compound over time.
2. 30 mm Asymmetric Hookless Rim: The wider internal width encourages modern XC tires to run at lower pressures with a more stable, controlled casing shape. The asymmetric profile helps equalize spoke tension between the drive and non-drive sides of the rear wheel, which improves durability and spoke load distribution under hard efforts.
3. Instant Drive 360 Engagement: Mavic's freehub mechanism is designed to eliminate the lag between pedal input and rear wheel response. On steep, technical climbs where body weight and traction are constantly shifting, near-instant engagement means you can dab a foot, reset, and immediately transfer power without losing momentum to mechanical delay.
4. UST Tubeless Integration: Mavic's UST standard was purpose-built for tubeless — not retrofitted. The hookless bead seats securely and is designed to hold an airtight seal with less effort than systems that rely on a tight mechanical hook. The result is a setup process that is reliable and repeatable, race after race.
5. Boost Axle Compatibility: The 15×110 mm front and 12×148 mm rear Boost spacing widens the hub flange stance, increasing lateral stiffness in both wheels. On a carbon rim this light, that added structural rigidity keeps handling precise under the kind of off-camber, high-speed loads that expose weaker wheelsets.

Final Take

The Crossmax SL Ultimate 30 is built for riders who approach XC racing or fast trail riding with a high level of seriousness — those who understand what a well-engineered wheelset actually contributes to performance and aren't interested in carrying a gram more than they have to. If your discipline demands light weight, reliable tubeless setup, and immediate drivetrain response on demanding terrain, this Mavic carbon wheelset delivers all three without asking you to accept a trade-off.