Carbon Fiber Sporting Goods
700c Carbon Rim 80mm Deep | 34mm Wide UV Shape | Triathlon & Ironman Racing
700c Carbon Rim 80mm Deep | 34mm Wide UV Shape | Triathlon & Ironman Racing
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80mm Deep 700c Carbon Rim for Triathlon, Ironman & Competitive Time Trial
The 80mm deep, 34mm outer-wide UV-shape carbon rim delivers a measured aerodynamic profile purpose-built for flat to rolling triathlon and Ironman courses. Available in two outer widths — 34mm and 30mm — with a 23mm inner width optimised for 25–28mm tubeless or clincher tyres. Weight runs 580–610 g per rim (±15 g tolerance), competitive with comparable aero rims in the 560–620 g range.
Key Specifications
| Parameter | Value |
|---|---|
| Wheel Size | 700c (ISO 622) |
| Rim Shape | UV (toroidal) profile |
| Rim Depth | 80 mm |
| Outer Width | 34 mm / 30 mm |
| Inner Width | 23 mm |
| ERD | 478 mm |
| Weight per rim | 580 g (30 mm) / 610 g (34 mm) ±15 g |
| Max Rider Weight | 120 kg |
| Tyre Pressure Range | 100–125 psi |
| Valve Hole | 6.5 mm (customisable) |
| Spoke Hole | 4.5 mm (customisable) |
| Assembly Hole | 7.5 mm (customisable) |
| Nipple Angle (Front) | 7° |
| Nipple Angle (Rear) | 5° / 7° or custom |
| Flatness (lateral runout) | <0.15 mm |
| Roundness (radial runout) | <0.3 mm |
| Dynamic Balance | <3 g |
Structural Integrity & Load Testing
- Forward Compressive Strength: >300 kg
- Lateral Torsion Resistance: >50 kg
- Spoke Hole Tension: >280 kg
Each rim is individually tested for flatness, roundness, and spoke-hole tension before dispatch, reflecting a manufacturing process refined over a decade of supplying professional cycling teams and OEM brands across Europe and North America.
UV Shape vs. Toroidal — What It Means for Racing
The UV (also referred to as toroidal or U-V) profile features a rounded outer edge that smooths airflow re-attachment at yaw angles common in open-road racing (5°–15°). Compared to a traditional box-section rim, the UV shape reduces measured drag at crosswind yaw. The 34mm outer width further widens the tyre-to-rim interface, reducing tyre-induced turbulence. Trade-off note: at 80mm depth, side-wind handling demands increase in gusting conditions above 30 km/h crosswinds — a factor to consider for lighter riders (<65 kg) in exposed Ironman courses.
Customisation Options
- Hole diameters (valve, spoke, assembly) available in custom sizes
- Nipple direction configurable per axle position
- Compatible with tubeless, clincher, and tubular setups
- OEM branding and colourway available for team and brand orders
Frequently Asked Questions
- What rim depth is best for an Ironman bike build?
- For flat to moderately rolling Ironman courses, an 80mm deep rim offers a strong aerodynamic return. Most athletes and coaches target 60–90mm depth for time-trial and triathlon disciplines where sustained speed outweighs handling variability. Riders in consistently windy conditions may prefer 60–65mm for a better crosswind margin.
- Is the 34mm wide carbon rim better than 30mm for triathlon aerodynamics?
- The 34mm outer width pairs best with 25–28mm tyres, aligning the rim-to-tyre transition for reduced aerodynamic drag. The 30mm option suits 23–25mm tyres and saves approximately 30 g per rim. For most modern triathlon setups running 25mm+ tyres, the 34mm profile is the recommended choice.
- How heavy should a 700c carbon rim be for a triathlon wheelset?
- Competitive 80mm carbon rims typically weigh between 560 g and 650 g. At 580–610 g, this rim sits within the performance bracket, balancing aerodynamic depth with rotational mass suitable for Ironman and Olympic-distance racing.
- What does UV shape mean compared to a standard box-section rim?
- UV shape describes a toroidal (rounded) outer rim profile. Unlike a squared box-section, the curved surface improves airflow re-attachment at varied yaw angles, reducing aerodynamic drag in crosswind conditions common on open triathlon courses.
- Are these rims compatible with tubeless tyres?
- Yes. The 23mm inner width and 6.5mm valve hole are compatible with tubeless and tubeless-ready tyre systems. Confirm hook or hookless compatibility with your specific tyre brand before assembly.
