This 30mm tall and 30mm wide carbon fiber mountain bike rim is an ideal choice for off-road riding. It is made of high-quality carbon fiber, achieving a perfect combination of lightweight and high strength. It can not only reduce the riding burden and improve acceleration and climbing performance, but also calmly cope with bumps and impacts during off-road. The Hookless design is specially created for tubeless tires, which not only has excellent sealing performance, reduces the risk of air leakage and tire detachment, but also simplifies the installation and maintenance process. Coupled with the 30mm wide size, it can be adapted to 2.2-2.8 inch wide tires, enhancing grip and stability on complex terrain. At the same time, it supports personalized customization of colors, patterns, logos, etc., making the product both functional and unique.

Our factory has professional carbon fiber processing technology and a mature production system. From raw material selection to forming processes, we strictly control every step to ensure the stable quality of each rim. The factory is equipped with advanced customized production lines, which can accurately meet customers' personalized needs. Whether it is appearance design or performance parameter adjustment, we can respond and implement efficiently. With a deep understanding of off-road riding scenarios, we continuously optimize product details to keep the rim competitive in core indicators such as strength, weight, and adaptability, providing reliable equipment support for cycling enthusiasts.

Product Features and Advantages

High-Strength Carbon Fiber Material:

Crafted from high-grade carbon fiber (such as Toray T700/T800), this 30mm tall and 30mm wide rim boasts an exceptional weight-to-strength ratio. Compared to traditional aluminum rims, it trims overall wheel weight by 20-30% on average, while significantly boosting tensile strength and impact resistance. This winning combination lightens the load for riders during long hauls and ensures steady performance when tackling off-road obstacles like rocks or tree roots, directly enhancing riding performance—think snappier acceleration, easier uphill climbs with reduced unsprung weight, and extended durability against rough terrain.

Hookless Design:

Its hookless design, a boon for tubeless tires, does away with traditional bead hooks to create a tighter, more uniform seal between tire and rim. This minimizes air leakage even at low pressures (as low as 15-20 psi), critical for off-road rides where low pressure boosts traction by increasing the tire’s contact area. It also simplifies tubeless setup and maintenance, cutting down on tire damage from friction during installation. Paired with a specially treated rim bed, it ensures long-term airtightness, eliminating inner tubes and the risk of pinch flats, letting riders tackle tough trails with greater confidence.

Size Optimization:

The 30mm outer width is fine-tuned to fit 1.9-2.35 inch off-road tires, supporting the tire’s sidewall to prevent excessive deformation during sharp turns or heavy loads, thus boosting cornering stability. The 30mm height strikes a perfect balance: it delivers enough rigidity to resist torsional forces during acceleration and braking without the cumbersome handling of taller rims, ensuring agility in narrow or technical sections. This dimension optimization enhances terrain adaptability—on mud, the width increases ground contact to avoid sinking; on rocks, the rigid structure maintains tire shape for stable traction; on gravel, it reduces the risk of getting caught on stones.

Personalized Customization:

Beyond functionality, it offers rich customization options, from matte, glossy, or metallic colors to personalized patterns, logos, or even laser-engraved signatures. This lets riders match the rim to their bike’s style, turning a functional part into a personal statement. In a market saturated with mass-produced components, this uniqueness appeals to competitive riders aiming for a memorable image, casual enthusiasts seeking ownership, and brands looking to craft exclusive lines.

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 Composite Structure:

In terms of material structure, it adopts a carbon fiber composite integral molding process, with fiber layers woven crosswise at specific angles. This not only ensures the frame rigidity of 30mm height and 30mm outer width but also reduces the rotational inertia of the rim through lightweight properties. The molecular structure characteristics of carbon fiber enable the rim to absorb vibrations through micro-deformations between fibers when subjected to off-road impacts, reducing the impact of bumps on riding compared to metal materials.

30mm Square Cross-Section Size:

In terms of dimensional structure, the 30mm height and outer width form a balanced "square" cross-section. This structure provides sufficient support area for the rim sidewalls. When adapting to 1.9-2.35 inch wide tires, it can evenly distribute tire pressure, avoiding sidewall bulging during cornering or heavy loads; the 30mm height, through an optimized cross-sectional curvature, ensures longitudinal torsional strength while reducing the interference of wind resistance on off-road flexibility, making it particularly suitable for frequent steering operations on complex terrains.

Hookless Design:

The Hookless design is the core of the design. The rim edge eliminates the traditional bead hook and is replaced with a smoothly transitioning arc-shaped sealing surface. This structure allows the tubeless tire bead to form a uniform annular fit with the rim, and combined with the micro-textured treatment of the inner wall, it improves sealing performance under low tire pressure; at the same time, the hookless design eliminates stress concentration points, keeping the carbon fiber structure continuous at the rim edge, enhancing impact resistance, and reducing the risk of rim cracking during off-road use.

Reserved Customization Structure Foundation：

In addition, the rim reserves a structural foundation for personalized customization. The surface coating adopts a treatment layer compatible with various coloring processes, and the inner wall reserves evenly distributed marking and engraving positions. This not only does not damage the integrity of the carbon fiber structure but also meets the needs of adding personalized elements such as patterns and logos, achieving the integration of function and aesthetics.

Application Areas

Application areas for the XC-M30X30HL-29ER carbon bicycle rim:

• Off-Road and Mountain Trails:

In rugged off-road and mountain environments—where loose gravel, tree roots, and uneven slopes dominate—the rim’s carbon fiber composite structure excels. Its high strength resists impacts from unexpected obstacles, while the cross-woven fibers absorb vibrations, reducing rider fatigue during long stretches of rough terrain. The 30mm square cross-section provides robust sidewall support, preventing tire damage when navigating tight mountain passes or clambering over rocks. The Hookless design’s enhanced airtightness ensures reliable tubeless performance, even when mud, dirt, or debris cling to the rim-tire interface, making it a steadfast companion for deep mountain explorations.

• Daily Training Sessions:

For daily training—whether on mixed terrain or dedicated practice tracks—the rim’s balanced performance shines. Its lightweight nature (20-30% lighter than aluminum rims) eases the strain of repeated acceleration and braking drills, helping riders build endurance without excessive fatigue. The 30mm height and width strike a perfect chord for consistent handling: during interval training on rolling hills, the optimized torsional strength ensures efficient power transfer, while the stable tire fit from the Hookless design allows riders to focus on refining techniques like cornering and line selection. Additionally, the customizable options let riders personalize their gear, adding a touch of motivation to regular training routines.

• Competitive Mountain Events: 

In high-stakes mountain competitions, where split-second decisions and durability matter most, this rim delivers. Its rigidity and flexibility balance enables quick, precise turns on technical downhill sections, while the lightweight build supports rapid acceleration on flat stretches. The Hookless design’s secure tubeless seal eliminates the risk of sudden deflation mid-race, and the carbon fiber’s durability withstands the intense, prolonged demands of competitive mountain biking. Whether it’s a local mountain race or a professional off-road event, the rim ensures consistent performance when it counts.

Technical Parameters

Customized Weaves & Finishes:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning:

Packing:

XC-M30X30HL-29ER Product Show