ax-lightness Ultra 45CX Wheelset - 28" | Carbon | TLR | Clincher | Centerlock - 12x100mm | 12x142mm - SRAM XDR

ax-lightness ULTRA 45CX - Aero and lightweight design for road, gravel, and cyclocross.

The ULTRA 45CX is the ideal compromise for riders who don’t want to choose between aerodynamic efficiency and low weight. With a 45 mm profile height, 30 mm outer width, and 24 mm inner rim width, it bridges the gap between all-around agility and genuine aero advantage. Whether on the road, in gravel races, or in cyclocross. The total weight of just 1180 grams (including tubeless rim tape, ±5%) with a maximum system weight of 130 kg makes it one of the highest-performance wheelsets in its class. The flared rim shape ensures high crosswind stability and a smooth ride even in gusty conditions.

Both the front and rear wheels feature 20 carbon blade spokes in a double-cross pattern. They transfer every watt directly and without loss, offer high lateral and torsional stiffness, and are lighter and more aerodynamic than any steel or stainless steel spoke. Combined with the 45mm-high rim profile, the result is a wheelset that performs impressively both on climbs and in sprints.

The in-house ax-lightness ULTRA CX hubs with ratchet freewheel and ceramic bearings ensure minimal rolling resistance and maximum durability. The matte UD finish with black laser-etched decals sets clear visual priorities. The ULTRA 45CX demonstrates its racing prowess daily on the Continental Team BENOTTI Berthold.

Features of the ax-lightness Ultra 45CX wheelset

• Application: Road bike, cyclocross, gravel, race
• Front wheel axle standard: 12x100mm thru axle
• Rear wheel axle standard: 12x142mm thru axle
• Brake disc mount: Center Lock
• Decal color: laser-etched
• Outer rim width: 30 mm
• Inner rim width: 24 mm
• Rim height: 45 mm
• Rim material: Carbon
• Rim type: Full-carbon clincher with hooks, TLR
• Freewheel: Ratchet system
• Weight: 1180 g (±5%)
• Bearings: Ceramic
• Max. recommended tire pressure: 28 mm: 7.0 bar | 32 mm: 5.0 bar | 40 mm: 3.5 bar | 45 mm: 2.8 bar
• Spokes: Carbon blade spokes
• Number of spokes: Front wheel 20, rear wheel 20
• tubeless ready
• Maximum system weight: 130 kg

Scope of delivery:

Wheelset incl. tubeless rim tape