The carbon fiber material endows it with the dual advantages of lightweight and high strength, effectively enhancing riding acceleration and climbing efficiency while ensuring durability. The 40mm medium rim height balances aerodynamic performance and handling flexibility, making it suitable for various scenarios such as road cycling and long-distance trips. With a 26mm external width, it supports wide tubeless tires (e.g., 28C-32C), which increase the ground contact area to enhance grip and shock absorption, improving riding stability and comfort. The tubeless system reduces the risk of punctures and simplifies maintenance.

Overall, through the synergistic design of material, structure, and function, this hub provides an upgraded option that combines speed, stability, and durability for riders with different needs.

The factory accepts customization of paint stickers, hole counts, weight, and carbon fiber spokes.

As a professional manufacturer of carbon fiber road bike rims, we take pride in being a reliable supplier for global clients. We offer wholesale services with bulk ordering options to meet large-scale demands. Our products support private label customization, and we provide comprehensive OEM and ODM solutions to cater to diverse market needs. Whether working with dealers, traders, or distributors, we ensure consistent quality and flexible cooperation terms. This carbon fiber road bike rim, crafted with precision, embodies our commitment to excellence in manufacturering, making it a standout choice for companies seeking top-tier cycling components.

Product Features and Advantages

Premium Carbon Fiber Construction:

Crafted from high-grade carbon fiber, this road bike rim achieves an ultra-lightweight profile with a minimum weight of just 375g per rim. This exceptional lightness reduces rotational inertia, enhancing acceleration responsiveness and climbing efficiency—critical for both competitive racing and long-distance rides where every watt counts.

Optimized 40mm Rim Height:

The 40mm rim height strikes a perfect balance between aerodynamic performance and handling agility. It minimizes wind resistance during high-speed cruising to boost sustained speed on flat roads, while remaining lightweight enough to avoid compromising maneuverability in tight turns or steep climbs—ideal for versatile road riding.

26mm External Width for Enhanced Performance:

With a 26mm external width (paired with a calibrated internal width), the rim seamlessly accommodates wider tubeless tires (e.g., 23C-42C). This setup increases tire contact with the road, improving grip and stability across varied surfaces—from smooth tarmac to light gravel—while enhancing shock absorption for a more comfortable ride.

Tubeless-Ready Design:

Engineered for tubeless compatibility, it eliminates the need for inner tubes, significantly reducing the risk of pinch flats and punctures. This design also allows riders to fine-tune tire pressure for optimal rolling resistance and comfort, ensuring uninterrupted performance even on long-haul journeys.

Customizable Options for Personalization:

Offering extensive customization, the rim can be tailored to individual preferences, including custom finishes, paint colors, and spoke hole counts. This allows riders to match their bike’s aesthetics or optimize spoke lacing patterns for specific riding styles, blending performance with personal style

Durable and Reliable:

Despite its lightweight design, the carbon fiber structure delivers impressive strength and impact resistance, ensuring durability across rigorous training sessions and competitive events. It’s built to withstand the demands of high-intensity road riding while maintaining consistent performance over time.

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

Material:

Constructed from carbon fiber, which offers high strength and low density. This ensures the rim maintains structural integrity while effectively reducing the overall weight of the road bike wheel, enhancing riding efficiency and handling.

Height and Width:

The rim has a height of 40mm, providing aerodynamic advantages to reduce wind resistance during road bike rides. It features an external width of 26mm, which is designed to accommodate compatible road bike tires, offering better support and stability.

Internal Structure:

Internal Structure: To guarantee rigidity and strength, the road bike rim may utilize a multi-layer carbon fiber cloth lamination. Key areas, such as around the spoke holes, are reinforced. 

Tire Groove Design：

 It is compatible with tubeless road bike tires, and the tire groove is engineered to form a tight seal with the tubeless tire, ensuring stable air pressure inside the road bike tire. Typically, the inner part of the tire groove features special textures or protrusions to increase friction and adhesion between the tire and the rim, preventing the road bike tire from slipping during operation.

Brake Type：

This road bike rim is designed for disc brakes, featuring a dedicated disc rotor mounting interface to accommodate the brake disc, enabling efficient braking performance for road bikes.

Application Areas

Application areas for the D40X26TL carbon bicycle rim:

• General Road Racing/Group Rides:

Scenario Features: Mixed terrain including flat-road cruising, short hill sprints, and rolling-road shifts, requiring a balance of aerodynamics, lightweight performance, and maneuverability.

Adaptation Advantages:

Carbon fiber material: Its lightweight nature (estimated single rim weight: 375-440g) improves acceleration response. Combined with the stable braking power of disc brakes (especially in rain or long descents), it ensures safety during high-intensity group rides.

• Long-Distance Endurance Riding:

Scenario Features: Daily rides of 100-200km covering urban roads and rural paths, requiring comfort, durability, and wide-tire compatibility.

Adaptation Advantages:

Tubeless-ready + wide tire support: Compatible with 32-42C tires, The tubeless design also lowers the risk of flats, eliminating the need to carry spare inner tubes.

Carbon fiber resilience: Compared to aluminum, high-quality carbon fiber rims better resist micro-deformation, avoiding "metal fatigue" under high-frequency long-distance vibrations. Paired with disc brakes (no wear issues on rim brake tracks), they offer sufficient durability for repeated long rides.

• Gravel Lite (Mixed Terrain):

Scenario Features: Light gravel, dirt roads, or paved rural trails, requiring a mix of road bike efficiency and moderate off-road capability.

Adaptation Advantages:

26mm external width + 42C maximum tire capacity: Accommodates 38-42C lightweight gravel tires (with shallow treads). The wider rim provides better tire sidewall support, preventing deformation during turns, while the wider tire contact patch enhances grip on loose gravel.

Disc brakes + tubeless design: Disc brakes outperform rim brakes on muddy surfaces, and the tubeless seal prevents small stones from piercing the tire, making it suitable for "cross-border rides" extending from roads to light off-road terrain.

• Daily Training and Commuting:

Scenario Features: Frequent use across diverse surfaces (asphalt, concrete, occasional puddles), requiring a mix of performance and practicality.

Adaptation Advantages:

Multi-tire compatibility: Use 25-28C fast tires for daily training to boost intensity, or switch to 32C puncture-resistant tires for commuting to handle urban gravel—no need to change rims for different scenarios.

Low-maintenance disc brakes: Eliminates wear on rim brake tracks, avoiding the need to replace brake surfaces over time. Tubeless sealant can quickly repair small punctures, reducing daily maintenance costs.

Technical Parameters

Customized Weaves & Finishes:

Customized Laser Engraving Brake Track:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning：

Packing：

D40X26TL Product Show