The 40mm height and 26mm external width carbon fiber road bike rim is specifically designed for tubular tires, making it a great fit for road races, endurance rides, and daily training. Crafted from Japanese Toray carbon fiber with proprietary layering technology, it achieves a perfect balance of high strength and lightness, with each rim weighing as low as 350g, while its structure is optimized for tubular use. Produced in advanced factories with a monthly output of over 10,000 units, it supports customizations like paint, hole counts, and spokes to meet wholesale and private label needs, and enjoys annual sales exceeding 100,000 units.

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 manufacturing, making it a standout choice for companies seeking top-tier cycling components.

Product Features and Advantages

Superior Performance:

The 40mm height enhances aerodynamics, reducing air resistance during high-speed rides, while the 26mm external width improves stability and road contact, making it ideal for road races and endurance rides. Crafted from Japanese Toray carbon fiber, it boasts high strength to withstand intense riding pressures, yet remains lightweight (as low as 300g/rim) to boost acceleration and reduce fatigue.

Perfect Compatibility:

Specifically designed for tubular tires, ensuring a secure fit and optimal performance.The structure is also optimized for tubular use, offering versatility.

Strong Production Support:

With advanced factories producing over 10,000 units monthly, it can meet large wh

Premium Material:

Utilizes high-quality Japanese Toray carbon fiber with proprietary layering technology.

Customizable:

Supports various customizations such as paint, hole counts, and spokes to cater to private label needs and individual preferences.

Multi-scene Adaptability:

Suitable for road races, endurance rides, and daily training, delivering consistent performance across different scenarios.

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

Optimized Dimensional Structure:

The 40mm height is designed with a streamlined profile, which not only reduces air resistance during high-speed rotation but also enhances the overall rigidity of the rim. The 26mm external width, paired with a specially calibrated internal width, ensures a tight and stable fit with tubular tires, preventing slippage even under intense riding conditions.

Reinforced Carbon Fiber Layering:

Adopting a multi-directional carbon fiber layering structure, with high-tensile Japanese Toray carbon fibers arranged in both circumferential and radial directions. This design strengthens the rim's resistance to impact and torsional forces, making it capable of withstanding the high pressures generated by tubular tires when inflated.

Tubular-Specific Bead Design:

The rim features a unique bead seat structure tailored for tubular tires, with precise groove depths and angles that facilitate easy gluing and ensure a secure bond between the tire and rim. This specialized design also helps maintain consistent air pressure within the tubular tire, enhancing riding stability.

Lightweight yet Sturdy Core：

The internal structure is hollowed out in key areas using advanced molding techniques, reducing unnecessary weight while retaining critical structural support. This allows the rim to achieve a lightweight profile (as low as 300g/rim) without compromising its ability to bear the load of tubular tires and rider weight.

Application Areas

Application areas for the D40X26T carbon bicycle rim:

• Professional Road Racing:

The 40mm streamlined height minimizes air resistance, critical for sprints and maintaining high speeds in competitive events. Its reinforced carbon fiber layering and sturdy core ensure it can handle the intense forces of race-day efforts, while the tubular-specific bead design keeps tires securely bonded during sharp turns and sudden accelerations.

• Long-Distance Endurance Riding:

The lightweight profile (as low as 300g/rim) reduces rider fatigue over extended distances, such as century rides or multi-day tours. The 26mm external width, paired with a calibrated internal width, enhances stability on varied road surfaces, and the seamless tubular tire bond minimizes the risk of punctures—key for uninterrupted long-haul journeys.

• Training and Recreational Road Cycling:

For serious enthusiasts honing their skills, the rim’s balanced rigidity and aerodynamics provide a responsive ride that mirrors race-day feel. Its durability, thanks to multi-directional carbon fiber layering, stands up to frequent training sessions, while the lightweight design makes it approachable for casual road rides too.

• Time Trials and Triathlons:

The aerodynamic 40mm height is a standout in time-based events, where every second counts. The secure tubular tire bond and stable structure ensure consistent performance during the high-intensity, solo efforts typical of time trials and triathlon bike legs.

Technical Parameters

The above parameters are for reference only, please consult our engineers for specific technical parameters.

Customized Weaves & Finishes:

Customized Laser Engraving Brake Track:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning：

Packing：

D40X26T Product Show