Leeze
CH 25 ULTRA AR
CH 25 ULTRA AR
Standard / Shimano
Leeze Bike Store
Hohenholter Straße 25
Leeze GmbH
48329 Havixbeck
Germany
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The Leeze Premium wheelset is designed for maximum weight savings on any terrain. Featuring the best components for ultimate quality and performance—CH 25 ULTRA AR. Lightweight construction in a class of its own and ultra-agile.
- Specialist in long tours on mountainous to alpine terrain
- Leeze ULTRA lightweight construction: 944 grams (± 5%) per wheel set
- Maximum weight reduction for long climbs
- Allroad wheelset suitable for use on roads and excursions onto gravel paths
- Leeze ULTRA Hubs (made in Germany)
- Carbon aero spokes in a 2:1 lacing pattern
- Best road comfort setup with 30-32 mm wide tires
- Best allroad setup with 35-40 mm wide tires
- Tire widths from 30 to 55 mm can be used
(Hookless compatibility must be approved by the tire manufacturer! Maximum pressure: 5 bar – may need to be reduced further depending on the tire installed!)
| Weight1 | 944 g (±5%) | |
| Wheel material | Carbon | |
| Wheel type | 24-622 without hooks | |
| Braking system | Centerlock disc brake | |
| Rim height | 25 mm | |
| Wheel width | 29 mm | |
| jaw width | 24 mm | |
| Logos | black, painted | |
| Tire type | Hookless folding/clinch tires, tubeless-ready only | |
| Tire widths | 30–55 mm | |
| Hub | Leeze ULTRA VR & HR | |
| freewheel | Shimano 10-/11-/12-speed / SRAM 10-/11-speed, SRAM XDR 12-/13-speed | |
| Axle standard | 12 mm thru-axle (12x100 mm, 12x142 mm) | |
| Number of spokes | 21/21 | |
| Spokes VR | VONOA Carbon Aero, 3-ply cross-ply / VONOA Carbon Aero, radial | |
| Spokes HR | VONOA Carbon Aero, radial / VONOA Carbon Aero, 3-ply cross-ply | |
| Weight limit | 90 kg system weight |
- Wheel set
- Valve stickers to prevent valve rattling (2 pcs.)
- 2x tubeless rim tape (already installed)
- Leeze Double Bike Bag
Available to match your wheelset: tubeless valves, tire kits, brake rotors, and cassettes.
Leeze GmbH
Hohenholter Straße 25
48329 Havixbeck
Germany
info@leeze.de
Manufacturer's part number: LRS-11974-01
Here you'll find detailed instructions on how to use and maintain your wheelset:
Please observe the following safety instructions to ensure your safety and the longevity of your wheels. The accompanying or online user manual is an integral part of the product and must be read in its entirety before use.
Do not exceed the specified maximum total weight (rider + bike + luggage). Exceeding this limit can lead to equipment failure and cause a fall resulting in serious injury.
Do not exceed the specified maximum tire pressure. Always take into account the combination of tire, rim, and setup (reduced maximum pressures, especially for tubeless and hookless setups)! If different values apply to the wheel and tire, the lower value is always the valid maximum. Excessive pressure can cause a tire blowout and thus lead directly to crashes with serious injuries.
Use only tire types and sizes approved in the spec sheet (especially for tubeless and hookless setups). Incorrect combinations can lead to tire failure or the tire coming off the rim, which can directly cause crashes resulting in serious injuries.
The assembly, disassembly, and maintenance of safety-critical components (e.g., spokes, hub bearings, tubeless setup, brake rotors, thru-axles, cassette) must only be performed by qualified specialist personnel. Improper execution can lead to material failure and serious accidents.
Always tighten thru-axles, cassettes, and brake rotors with a torque wrench, observing the torque values specified by the respective manufacturer. Grease the freehub body before installing the cassette to prevent cogging of the sprockets. When mounting or dismounting tires, use only plastic tire levers as a last resort; never use metal levers or other hard objects to avoid damage to the rim and tire.
Only use the wheelset for its intended purposes (e.g., road bike or gravel), see link: Leeze Application Areas. Use the wheelset only with disc brakes. Do not expose the wheels to high temperatures (e.g., in a car in the sun or leaning against a radiator). Not suitable for downhill, BMX, jumps, cargo transport, or other extreme forms of use.
Regularly check your wheels for cracks, delamination, and damage to spoke holes, brake track, or rim bed. For optimal spoke tension and trueness, we recommend wheel checks every 5,000–10,000 km, every 12–24 months, or after 6 months of inactivity. If damage is suspected, stop riding immediately and contact Leeze service. In case of doubt, discontinue use immediately and consult the manufacturer or a specialist dealer.
Clean rims, spokes, and hubs regularly with mild soap and water; avoid high-pressure cleaners and direct water jets on bearings. Store wheels dry and dry them after wet rides. For extended periods of inactivity (>6 months), we recommend a bearing and wheel check. Clean and grease the freehub system regularly. For tubeless systems, replace sealant and rim tape at least twice a year to prevent damage to spoke nipples. Negligence in maintenance can lead to premature wear, malfunctions, or sudden failure during a ride, thus posing a safety risk.
Stop riding immediately and have the wheels professionally inspected, even for minor or invisible damage. Invisible cracks in the carbon can lead to sudden breakage and a crash.
ULTIMATE PERFORMANCE – THE FLAGSHIP OF LEEZE LABS
LEEZE ULTRA
The Foundation: Over 12 years of wheel development expertise
With over 12 years of experience in wheel development, we have brought our vision of the perfect wheel to life in the new ULTRA product line. We make no compromises when it comes to ultimate performance: ULTRA wheels feature the latest technologies and only the highest-quality components.
The goal: to push the boundaries of what is technologically possible
We asked ourselves: Are we capable of bringing our vision of the perfect wheelset to life? After several years of development, we present the answer with the Leeze ULTRA product line. Here, we demonstrate what we at Leeze are capable of achieving through our passion for wheelbuilding.
The ULTRA product line is Leeze Labs' new flagship: it combines the finest materials and technologies with Leeze's decades of expertise—for perfection in wheel building.
Hand-selected premium components: For the ULTRA line of wheels, we use only the highest-quality components. This ensures that every ULTRA wheel is built to perfection and meets the highest standards.
Leeze Labs
Ultimate agility: Optimized fiber layout of the ULTRA carbon rims with ultra-thin water-transfer decals. The combination of CeramicSpeed bearings and ultra-stiff VONOA Aero carbon spokes, coupled with precise, manual assembly on-site in Havixbeck, delivers unprecedented agility and reduced inertia—the ULTRA performance advantage.
