Carbon Fiber Sporting Goods
29er Carbon MTB Rim 30mm Height 25mm Inner Width – All Mountain & XC
29er Carbon MTB Rim 30mm Height 25mm Inner Width – All Mountain & XC
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29er Carbon MTB Rim — 30mm Height, 25mm Inner Width
A precision-engineered carbon fiber mountain bike rim built for 29-inch wheels, offering a 30mm profile height and 25mm inner width. Available in Standard (385 ± 15 g) and Superlight (325 ± 10 g) builds, this rim is engineered for all-mountain and cross-country (XC) riders prioritizing stiffness, low rotating mass, and tubeless compatibility.
Key Specifications
| Specification | Value |
|---|---|
| Wheel Size | 29 inch (29er) |
| Rim Shape | U-Shape (Hookless-compatible) |
| Rim Height | 30 mm |
| Outer Width | 30 mm |
| Inner Width | 25 mm |
| ERD (Effective Rim Diameter) | 579 mm |
| Weight — Standard | 385 ± 15 g |
| Weight — Superlight | 325 ± 10 g |
| Forward Compressive Strength | > 300 kg |
| Lateral Torsion | > 50 kg |
| Spoke Hole Tension | > 280 kg |
| Dynamic Equilibrium | < 3 g imbalance |
| Flatness Tolerance | < 0.15 mm |
| Roundness Tolerance | < 0.3 mm |
| Valve Hole Diameter | 6.5 mm (customizable) |
| Spoke Hole Diameter | 4.5 mm (customizable) |
| Assembly Hole Diameter | 7.5 mm (customizable) |
| Nipple Angle | Left 5° / Right 7° (customizable) |
| Min / Max Tire Pressure | 45 / 65 psi |
| Maximum Rider Weight | 100 kg |
Riding Discipline Fit
- Cross-Country (XC) Racing: The Superlight build at 325 g reduces rotating mass, directly improving acceleration and climbing efficiency on XC race courses.
- All-Mountain / Trail: The 25 mm inner width accommodates 2.2–2.4 inch tires optimally, improving cornering stability and traction on technical terrain.
- Enduro (light use): Forward compressive strength exceeding 300 kg provides confidence on moderate high-impact sections, though riders seeking primary enduro use should consider a taller-profile rim.
Why 25mm Inner Width for MTB?
A 25 mm inner width sits within the ETRTO-recommended range for 2.2–2.4 inch mountain bike tires, producing a rounder tire cross-section that improves air volume, grip, and puncture resistance versus narrower 21–23 mm rims. Compared to 30 mm inner width rims optimized for 2.5 inch+ enduro tires, this rim maintains lower aerodynamic drag and weight — a measurable advantage in XC and short-travel all-mountain applications.
Standard vs. Superlight Build
| Feature | Standard | Superlight |
|---|---|---|
| Weight | 385 ± 15 g | 325 ± 10 g |
| Best For | All-mountain, endurance, team training | XC racing, weight-conscious builds |
| Durability Trade-off | Higher impact tolerance | Optimized for lower loads; 100 kg rider limit applies to both |
Customization Options
- Spoke hole count: configurable to your hub specification
- Valve hole diameter: 6.5 mm standard or custom
- Assembly and spoke hole diameters: customizable for OEM and team builds
- Nipple direction angles: Left 5° / Right 7° or custom offset
- Suitable for small-to-medium cycling brands requiring branded or private-label production
Warranty & Quality Assurance
Backed by a 3-year manufacturer warranty. Each rim undergoes flatness (< 0.15 mm) and roundness (< 0.3 mm) tolerance checks before shipment. Over a decade of supply partnerships with cycling brands and professional teams across Europe and North America.
Frequently Asked Questions
- Q: Is a 25mm inner width carbon rim good for trail and XC mountain biking?
- A: Yes. A 25 mm inner width is well-matched to 2.2–2.4 inch MTB tires per ETRTO guidelines, delivering an optimal tire cross-section for XC and trail use. It offers better cornering stability than sub-23 mm rims without the added weight of wider enduro-oriented options.
- Q: What is the difference between 30mm and 35mm height carbon MTB rims for XC?
- A: A 30 mm profile is lighter and has less aerodynamic drag in crosswind conditions — a practical advantage on technical XC courses with varied terrain. A 35 mm rim offers marginally higher lateral stiffness but adds rotational weight. For XC racing, 25–32 mm height is the commonly recommended range.
- Q: Are superlight carbon rims worth it for XC racing?
- A: For XC racing, the 60 g saving (325 g vs. 385 g per rim) of the Superlight build reduces rotating mass at the wheel's outer diameter, where weight reduction has a disproportionate effect on acceleration. The trade-off is a marginally tighter rider weight tolerance — both builds are rated to 100 kg.
- Q: Can this rim be used tubeless?
- A: Yes. The U-shape (hookless) rim profile and 6.5 mm valve hole are compatible with tubeless tire setups. Use a tubeless-rated tape and valves; maximum tire pressure is 65 psi.
- Q: What customization is available for OEM and team orders?
- A: Spoke hole count, valve hole diameter, assembly hole diameter, spoke hole diameter, and nipple angle can all be specified. Contact us for minimum order quantities and lead times for private-label or branded production.
