Carbon Fiber Sporting Goods
32er Asymmetric Carbon MTB Rim, 30mm IW, 30mm Height, Tubeless-Ready | BOLA
32er Asymmetric Carbon MTB Rim, 30mm IW, 30mm Height, Tubeless-Ready | BOLA
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The BOLA 32er Asymmetric Carbon MTB Rim is engineered for aggressive trail, enduro, and freeride riding on 32-inch wheel platforms (696mm BSD), supporting 2.3–2.8" tires with a 30mm inner width for optimal stability and low-pressure performance. This asymmetric U-shaped rim corrects up to 15% spoke-tension imbalance, improving wheel strength and lateral stiffness in high-load corners. Available in standard (450g ±10g) and superlight (350g ±10g) carbon layups.
Key Specifications
- Rim Size: 32er (696mm BSD)
- Internal Width: 30mm
- Rim Height: 30mm
- Outer Width: 36mm
- Effective Rim Diameter (ERD): 652mm
- Material: High-modulus carbon fiber composite (Toray-grade UD + woven)
- Profile: Asymmetric U-shape, tubeless-ready
- Weight Options: Standard 450g ±10g, Superlight 350g ±10g
- Compatible Tire Widths: 2.3–2.8" MTB tires
- Brake Interface: Standard 6-bolt and Centerlock disc
- Certifications & Testing: Forward compressive strength >300kg; Spoke tension >280kg; Lateral torsion >50kg; Dynamic balance tolerance <3g; Flatness <0.15mm (internal QC)
- Warranty: 3 years (structural)
Comparison Table
| Model | Internal Width | Rim Height | Weight | Rim Size | Profile |
|---|---|---|---|---|---|
| BOLA 32er | 30mm | 30mm | 350/450g | 32" (696mm) | Asymmetric |
| EN932X | 32mm | 26mm | 460g | 29" | Asymmetric |
| TR930X | 30mm | 25mm | 390g | 29" | Asymmetric |
| AM930X | 30mm | 25mm | 450g | 29" | Asymmetric |
Performance & Use-Cases
- Enduro & Freeride: Asymmetric spoke bed reduces tension disparities, increasing wheel durability under aggressive cornering and heavy loads.
- Wide Tire Support: 30mm inner width optimizes support for 2.3–2.8 inch tires, offering greater lateral stability than 25–27mm rims. Ideal for low-pressure, high-traction riding.
- Superlight Option: 350g version targets weight-conscious racers needing low mass without compromising on impact test standards (>300kg compressive).
- OEM/Custom Builds: Custom hole drilling and branding available for small/medium cycling brands and teams.
Frequently Asked Questions
What is the best asymmetric carbon MTB rim for enduro and freeride?
For demanding enduro/freeride use, a rim with at least 30mm inner width, >300kg compressive strength, and tested lateral stiffness is optimal. The BOLA 32er offers these specs, plus asymmetric spoke drilling for improved wheel durability over symmetric options.
Is 30mm inner width better than 25mm for aggressive trail riding?
Yes, a 30mm inner width gives wider tires improved sidewall support, reducing squirm and increasing confidence at lower pressures versus a 25mm rim. This is especially beneficial for 2.4–2.8 inch tires in aggressive trail or enduro conditions.
What are the advantages of an asymmetric carbon rim?
An asymmetric rim offsets the spoke drilling, correcting left/right tension imbalance common in disc brake wheels by up to 15%. This increases lateral stiffness, improves wheel lifespan, and maintains better trueness under high loads.
Which carbon rim should I choose for 2.6–2.8 inch tires on a 32er?
Select a rim with a 30mm or wider internal width. The BOLA 32er has a 30mm inner width that pairs well with 2.3–2.8" tires, supporting proper tire shape and stability at low pressure.
Is the 350g Superlight version strong enough for rough riding?
The BOLA 32er Superlight rim is independently tested to >300kg forward compressive and >50kg lateral torsion tolerances, suitable for competitive enduro and trail riding, though heavier riders or loaded bikepacking may prefer the 450g standard version for added margin.
