Carbon Fiber Sporting Goods
40mm Carbon Road Rim – 36mm Outer / 30mm Inner Width, Tubeless Ready, 700C, Ultralight (365–445g)
40mm Carbon Road Rim – 36mm Outer / 30mm Inner Width, Tubeless Ready, 700C, Ultralight (365–445g)
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40mm Carbon Road Rim – 36mm Wide, Tubeless Ready, 700C
A high-performance, tubeless-ready carbon road rim engineered for competitive racing, endurance cycling, and custom wheelset builds. The 30mm inner width accommodates tire widths from 25c to 50c, making it equally capable on fast road courses and mixed-surface endurance routes. Available in four verified weight tiers—from a standard 445g to an extreme-light 365g—so teams and brands can match rim specification precisely to rider demands.
Key Specifications
| Specification | Value |
|---|---|
| Rim Size | 700C |
| Rim Profile | UV Shape (hooked tubeless-compatible) |
| Rim Height | 40mm |
| Outer Width | 36mm |
| Inner Width | 30mm |
| ERD | 558mm |
| Valve Hole Diameter | 6.5mm (customizable) |
| Spoke Hole Diameter | 4.5mm (customizable) |
| Nipple Direction (Front) | 7° |
| Nipple Direction (Rear) | 5° & 7° (customizable) |
| Min / Max Tire Pressure | 100 / 125 psi |
| Max Rider Weight | 120 kg |
Weight Tiers
| Scheme | Weight per Rim |
|---|---|
| Standard | 445 ± 15g |
| Superlight | 410 ± 10g |
| Ultralight | 385 ± 10g |
| Extreme Light | 365 ± 10g |
Note: Lighter weight tiers use reduced laminate schedules. For riders above 90 kg or high-torque sprint applications, the Standard or Superlight tier is recommended for optimal fatigue resistance.
Structural Performance Data
- Forward Compressive Strength: >300 kg
- Lateral Torsion Resistance: >50 kg
- Spoke Hole Tension: >280 kg
- Dynamic Equilibrium: <3g imbalance
- Flatness Tolerance: <0.15mm
- Roundness Tolerance: <0.3mm
Compatibility & Customization
- Tire Compatibility: Tubeless and clincher tires, 25c–50c recommended range
- Frame Compatibility: Fits standard 700C road, endurance, and gravel frames with minimum 40mm rim clearance
- Hook Type: Hooked UV profile — compatible with standard road tubeless tires (not hookless-only tires)
- Drill Options: Assembly hole, valve hole, and spoke hole diameters available in custom sizes on request
- Custom Branding: OEM/private label available for cycling brands and professional teams
Frequently Asked Questions
- Is a 30mm inner width carbon rim suitable for endurance road and gravel cycling?
- Yes. A 30mm internal width supports tire widths from 28c to 45c at optimal inflation volume, reducing rolling resistance and improving compliance on rough surfaces — well-suited to endurance road and light gravel use.
- Are 36mm wide carbon rims compatible with standard road bike frames?
- Most modern road and endurance frames with 40mm+ rim clearance accommodate a 36mm outer-width rim without contact. Always verify your frame's stated maximum tire/rim clearance before ordering.
- What is the weight of an ultralight carbon road rim at this spec?
- The Ultralight tier of this rim weighs 385 ± 10g per rim. The Extreme Light option reaches 365 ± 10g. Both are achieved through selective carbon layup reduction; the Standard 445g tier is recommended for heavier riders or frequent training use.
- What makes this rim suitable for tubeless setup?
- The UV hooked bead profile seals tubeless tires securely within the 100–125 psi pressure range. The 6.5mm valve hole accommodates standard tubeless valves, and the rim bed geometry supports tubeless tape installation.
- Can I order custom hole diameters or nipple angles?
- Yes. Assembly hole, valve hole, and spoke hole diameters are customizable. Nipple direction options beyond the standard 7° front / 5°–7° rear are available on request for OEM and team orders.
