This full carbon fiber mountain bike rim is a core piece of equipment designed specifically for European and American off-road cycling enthusiasts who pursue high performance and personalization.

Crafted from full carbon fiber, it weighs only 255-360g. While achieving extreme lightness, it boasts excellent impact resistance and rigidity through optimized layering technology and a straight-side structure. It can easily handle frequent impacts from complex off-road terrains such as rocks and tree roots, balancing lightness and durability.

In terms of specifications, the 29er wheel size paired with a 30mm outer width perfectly fits mainstream Trail/All-Mountain models in Europe and America, and is compatible with 1.9-2.35 inch wide tires. It supports disc brake systems (a standard feature on European and American mountain bikes) and is compatible with tubeless tires, effectively reducing the risk of punctures. The recommended tire pressure range of 21-32psi enhances the tire's contact area and grip under low pressure conditions, improving stability during cornering and steep slope riding, which is specially optimized for mountain off-road scenarios.

In addition, in-depth personalized customization services are available. Customers can customize the paint color, carbon fiber pattern, and the number of spoke holes (such as 24/28/32) according to their needs, meeting exclusive requirements such as team logos and personal styles. It creates a rim option that combines performance and personality for off-road riders.

Product Features and Advantages

Carbon Fiber Core Advantages:

Ultra-Lightweight & High Strength: Made from full carbon fiber, the rim weighs only 255-360g, significantly reducing rotational inertia compared to aluminum rims. This lightweight design enhances acceleration, climbing efficiency, and overall maneuverability—critical for off-road riders navigating steep slopes and technical sections.

Exceptional Durability: Through advanced fiber layering technology and a straight-side structure, the carbon fiber material achieves an optimal balance of rigidity and impact resistance. It easily withstands repeated shocks from rocks, tree roots, and rough terrain, ensuring long-term reliability in harsh off-road conditions.

Fatigue Resistance: Carbon fiber’s inherent properties minimize flex and deformation during intense rides, maintaining consistent performance even after extended use—ideal for endurance-focused Trail and Enduro disciplines.

Mountain Off-Road Specific Features:

Optimized Traction & Stability: With a 30mm outer width and compatibility with 1.9-2.35 inch tires, the rim provides enhanced tire support. When paired with the recommended 21-32psi low tire pressure, it increases the tire’s contact area with the ground, delivering superior grip on loose dirt, wet rocks, and steep inclines—key for confident cornering and climbing in off-road environments.

Rugged Terrain Adaptability: The straight-side design and reinforced construction are engineered to handle the rigors of mountain trails. It resists warping or cracking when encountering sudden impacts from obstacles like boulders or fallen branches, ensuring consistent performance in unpredictable off-road conditions.

Disc Brake & Tubeless Readiness: Fully compatible with disc brake systems (the standard for modern mountain bikes), it ensures reliable stopping power even in muddy or wet conditions. Additionally, its tubeless-ready design reduces the risk of flats—a common nuisance in off-road riding—while allowing for lower tire pressures without sacrificing performance.

Factory-Offered Customization Strengths:

Tailored Aesthetics: Customers can personalize the rim with custom paint colors, carbon fiber weave patterns, or laser-etched logos (e.g., team emblems, personal insignias). This allows riders to match their bike’s style or create a unique visual identity, catering to the European and American markets’ strong demand for individualized gear.

Technical Customization: The number of spoke holes (24/28/32 options) can be customized to suit specific riding needs—24 holes for ultimate lightness in racing, 32 holes for enhanced durability in heavy-duty off-roading. This flexibility ensures the rim adapts to diverse rider preferences and usage scenarios.

Bespoke Compatibility: While retaining core specs (29er, 30mm width), the factory can adjust subtle details (e.g., rim wall thickness) for specialized needs, such as e-MTB compatibility or extreme terrain reinforcement—offering a level of customization rare in mass-produced rims.

Strict Quality Control:

KOBIKE do 100% tire pressure(150 PSI), flatness(＜0.2mm) and roundness(＜0.2mm) inspections before shipping, also offering 2 years warranty for our carbon rims.

Product Structure

Carbon Fiber Rim Body:

The core structure is crafted from multi-layer high-modulus carbon fiber fabric, bonded with high-strength epoxy resin. The layering pattern is strategically engineered:

Outer Layer: A dense, smooth carbon fiber weave (e.g., 3K or 12K) for surface durability and a premium finish, compatible with custom paint or laser etching.

Middle Layer: Reinforced with unidirectional carbon fibers aligned along the rim’s circumference, enhancing radial stiffness to resist deformation under high torque (critical for sprinting or steep climbs).

Inner Layer: Thicker carbon fiber patches at stress points (e.g., spoke holes, bead seats) to boost impact resistance, ensuring the rim withstands rock strikes and harsh landings in off-road terrain.

Straight Sidewall Design:

The rim features a hookless sidewall , designed for:

Compatibility with tubeless tire setups, creating an airtight seal with tire beads to prevent leaks.

Even distribution of stress during low-pressure rides (21-32psi), reducing the risk of sidewall bulging or damage when navigating rough trails.

Simplified manufacturing for consistent thickness, ensuring uniform strength across the entire rim circumference.

Spoke Hole Reinforcements:

Each spoke hole (available in 24/28/32 configurations) is reinforced with:

Integrated carbon fiber bushings to prevent spoke nipple wear and distribute tension evenly, reducing the risk of cracks from repeated stress.

Counterbored recesses on both inner and outer surfaces, ensuring flush spoke nipple seating and minimizing aerodynamic drag (a minor but valuable detail for fast-paced off-road segments).

Bead Seats & Tire Interface：

The rim’s bead seats (where the tire mounts) are precision-machined with:

A 30mm outer width to support 1.9-2.35 inch tires, with a rounded profile that enhances tire retention during aggressive cornering or sudden impacts.

Micro-grooves along the bead seats to improve tubeless sealant adhesion, further reducing the risk of flats in muddy or rocky conditions.

Disc Brake Mount Integration：

For seamless disc brake compatibility, the rim includes:

Pre-drilled and tapped mounting holes aligned with strict tolerance to ensure rotor concentricity, preventing brake rub and ensuring smooth, reliable stopping power.

A reinforced hub flange interface to handle the lateral forces generated during hard braking on descents.

Application Areas

Application areas for the XC-M22X30HL-29ER carbon bicycle rim:

• Cross-Country (XC) Riding:

Its lightweight design (255-360g) and compatibility with 1.9-inch tires optimize rolling efficiency, making it ideal for fast-paced XC races or long-distance off-road traversals where speed and endurance matter. The hookless sidewall and low pressure (21-32psi) support ensure steady grip on grassy trails or hardpack terrain.

• Mountain Trail Riding:

Perfect for varied mountain landscapes—from rocky descents to muddy switchbacks. The 30mm outer width enhances tire stability with 2.0-2.35-inch tires, while carbon fiber’s impact resistance handles frequent encounters with roots and boulders, balancing control and durability.

• Training Sessions: 

Whether preparing for races or honing technical skills, the rim’s versatility shines. Its customizable spoke hole options (24/28/32/36) allow riders to adjust for lightweight agility (training speed) or added strength (practicing jumps/heavy impacts), making it a reliable choice for consistent, high-intensity training.

Technical Parameters

Customized Weaves & Finishes:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning：

Packing:

XC-M22X30HL-29ER Product Show