Leeze
CH 45 PRO GX
CH 45 PRO GX
Standard / Shimano / Black
Leeze Bike Store
Hohenholter Straße 25
Leeze GmbH
48329 Havixbeck
Germany
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Go wider. Go faster.
The CH 45 PRO GX is your gravel racing upgrade for technical, varied terrain, fast sprints, and maximum control with high-volume tires. Designed for races where agility, traction, and precise handling make all the difference—when the terrain gets tougher, the racing line is constantly changing, and every burst of speed counts.With its extra-wide 30 mm hookless rim width, the CH 45 PRO GX provides an optimized fit for modern gravel tires and ensures high stability even with large tire volumes. The wide rim shoulder reliably supports the tire during fast turns and allows for lower tire pressures, providing more traction and control on rough terrain. The deliberately chosen rim height of 45 mm keeps the wheel both lightweight and aerodynamically stable. Agility, controlled handling, and a direct riding feel in technical racing situations are the result of a design consistently tailored to modern gravel racing with wide tires.
From a technical standpoint, the CH 45 PRO GX features a D2R Aero carbon rim with a 30 mm hookless rim depth and a 36 mm outer width—optimized for modern, high-volume gravel tires. 18 SAPIM CX carbon spokes per wheel minimize rotating mass, provide damping on rough sections, and maximize power transfer. Combined with the Leeze PRO hub, the result is an uncompromising gravel race wheelset with a total weight of just 1,240 grams.
- Technical gravel races with 45 mm+ tires*
- Best aero gravel setup with 40 mm* to 55 mm tires
- Tire widths from 40 mm* to 70 mm can be used
| Weight1 | 1240 g (±5%) | |
| Wheel material | Carbon | |
| Wheel type | 30-622 without hooks | |
| Braking system | Centerlock disc brake | |
| Rim height | 45 mm | |
| Wheel width | 36 mm | |
| jaw width | 30 mm | |
| Logos | white or black, painted | |
| Tire type | Hookless folding/clinch tires, tubeless-ready only | |
| Tire widths | 40–71 mm | |
| Hub | Leeze PRO VR & HR | |
| freewheel | Shimano 10-/11-/12-speed / SRAM 10-/11-speed, SRAM XDR 12-/13-speed, Shimano Micro Spline; conversion to Campagnolo and Campagnolo N3W possible | |
| Axle standard | 12 mm thru-axle (12x100 mm, 12x142 mm) | |
| Number of spokes | 18/18 | |
| Spokes VR | Sapim CX-Carbon, 2-cross / Sapim CX-Carbon, radial | |
| Spokes HR | Sapim CX-Carbon, 2-cross / Sapim CX-Carbon, radial | |
| Weight limit | 120 kg system weight |
- Wheel set
- Valve stickers to prevent valve rattling (2 pcs.)
- 2x tubeless rim tape (already installed)
Available to match your wheelset: tubeless valves, tire sets, brake rotors, and cassettes.
Leeze GmbH
Hohenholter Straße 25
48329 Havixbeck
Germany
info@leeze.de
Manufacturer's part number:
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 + bicycle + 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 resulting in serious injuries.
Use only tire types and sizes approved in the data 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. Only use the wheelset 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.
Uncompromising racing technology.
SAPIM CX Carbon
30% LIGHTER. 80% STIFFER.
Leeze PRO Hubs
293 grams PER SET.
D2R PRO Carbon Rims
60 grams lighter.
Optimized for tested 45 mm tires
D2R GRAVEL Performance
The 45 mm D2R GX PRO rim with a 28 mm hookless rim width is designed for 45 mm + gravel tires. In this range, there is an efficient transition between the tire and the rim, which reduces drag while enabling stable handling at high speeds. Ideal for mountainous gravel races and weight-optimized gravel setups.
Best gravel setup with 50 mm+ tires
Hard Gravel Setups
For challenging gravel routes with rough terrain, the 45 mm D2R GX PRO rim is designed to accommodate tire widths over 50 mm. The 30 mm hookless rim width stabilizes the wide tire and ensures a secure fit even at low air pressure. This improves control on loose terrain while further reducing rolling resistance on rough surfaces.
- Wide rim. Maximum tire volume.
- Optimized for 40–45 mm tires on aero all-round gravel setups and ready for 50+ mm tires on rough gravel.
- Wider outer rim. Modern aerodynamic profile.
- Optimized tire fit for gravel tires. Noticeably more control
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Carbon spoke technology.
SAPIM CX Carbon
The SAPIM CX-Carbon is the logical evolution of modern aero spokes.
Maximum stiffness, high tensile strength, and consistent durability in racing conditions.
Mechanical Performance.
Leeze PRO Hub
293 g per set.
High flange stiffness.
Fully compatible with freehubs in the Leeze ecosystem.
The PRO hub was specifically designed for use with Sapim CX-Carbon T-Head headsets.
Race Ready Performance.
Leeze lives and breathes cycling
The starting point for every development project is the Leeze Factory Racing Team's requirements.
ThePRO Seriesreplaces the EVO WASO Series, which was introduced in 2018.
It is the result of consistent optimization, based on thousands of test kilometers in actual racing conditions.
