Crafted from high-quality carbon fiber, this rim boasts exceptional structural strength. With a lightweight design of 400-490g per rim, it effectively reduces riding fatigue, making acceleration and handling feel more agile and responsive. The clever combination of 50mm height and 28mm external width not only conforms to aerodynamic principles to minimize wind resistance but also provides stable support. Particularly noteworthy is its wave rim design, which not only has a visually distinctive appearance but also disperses vibrations and stress during riding through its special structure, enhancing overall comfort and durability.

In terms of functional adaptability, the rim demonstrates strong inclusivity. It natively supports tubeless tires, eliminating the extra weight and puncture risks caused by inner tubes. Meanwhile, it is compatible with a wide range of tire sizes from 24C to 47C, easily handling road racing, gravel adventures, and light mountain biking. Equipped with a disc brake design, it ensures reliable braking performance in various weather and road conditions, safeguarding safe riding.

What's more, the rim offers abundant customization options. From the carbon fiber appearance and paint colors to the number of spoke holes, all can be adjusted according to personal preferences and actual needs, allowing every rider to have an exclusive personalized rim that enhances performance while showcasing a unique style.

Product Features and Advantages

High-Quality Material and Lightweight Design:

Crafted from high-quality carbon fiber, the rim not only boasts exceptional structural strength but also achieves a lightweight performance of only 400-490g per rim. The direct advantage of this feature is that it effectively reduces riding fatigue, making acceleration and handling more agile and flexible, saving riders' energy while improving riding efficiency.

Scientific Size Combination:

The clever combination of 50mm height and 28mm external width conforms to aerodynamic principles. Its advantage lies in effectively reducing wind resistance, minimizing the interference of air resistance during riding, and providing stable support for the rim, allowing riders to maintain stability even at high speeds or on complex road conditions.

Unique Wave Rim Structure:

The wave rim design not only has high visual recognition and showcases a unique style but, more importantly, can disperse vibrations and stress during riding through its special structure. This advantage significantly enhances the overall comfort and durability of the rim, enabling riders to have a good experience even during long-distance rides or on bumpy roads.

Strong Functional Adaptability:

It natively supports tubeless tires, eliminating the extra weight and puncture risks caused by inner tubes and improving riding smoothness; it is compatible with a variety of tire sizes from 24C to 47C, easily handling road racing, gravel adventures, and light mountain biking, with a wide range of applicable scenarios; paired with a disc brake design, it ensures reliable braking performance in various weather and road conditions, providing protection for riders' safe riding.

Abundant Customization Options：

It offers customization services for carbon fiber appearance, paint colors, and the number of spoke holes. The advantage of this feature is that every rider can create an exclusive rim according to personal preferences and actual needs, enhancing performance while showcasing unique personality and meeting the personalized needs of different riders.

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

Basic Material and Molding Structure:

Carbon Fiber Laminated Structure: High-quality carbon fiber yarns are made into prepregs through a special weaving process, and then formed by mold pressing and curing. Multiple layers of carbon fibers are arranged alternately in different directions (such as 0°, 45°, 90°), which not only ensures the overall torsional rigidity and radial strength of the rim but also controls the weight through reasonable fiber density distribution, achieving the lightweight goal of 400-490g.

 The edge of the rim adopts an integrally formed hookless or low-hook structure, combined with precise dimensional tolerances (28mm external width), forming a sealing surface that fits tightly with the tubeless tire bead. It can achieve high airtightness without an inner tube, providing a structural basis for tubeless tire adaptation.

Key Dimensions and Mechanical Structure:

50mm Height Symmetrical Cross-Section Structure: The side of the rim has a symmetrical arc-shaped cross-section, and the height design takes both aerodynamics and structural stability into account. The relatively high rim height enhances the longitudinal anti-deformation ability, and together with the high elastic modulus of the carbon fiber material, it reduces wind resistance interference during high-speed rotation and improves lateral support when cornering.

Wavy Rim Side Structure: The side of the rim adopts a wavy design with alternating high and low parts, which is not a simple decorative shape. The wavy form forms multiple "stress buffer zones" in the circumferential direction of the rim. When encountering vibrations or impacts during riding, the stress can be dispersed through the slight deformation of the wavy structure, reducing local fatigue damage, prolonging the service life, and improving riding comfort.

Functional Adaptation Structural Details:

Disc Brake Mounting Interface: Standardized disc brake hub mounting positions are reserved on both sides of the rim, and the interface size is compatible with mainstream disc brake systems. The disc is fixed by bolts to ensure stable force transmission during braking and avoid affecting the braking effect due to structural shaking.

Spoke Hole Distribution Design: The inner side of the rim is evenly distributed with a customizable number of spoke holes. The hole positions are reinforced (such as embedding metal bushings) to enhance the local compressive strength when the spokes are tightened, prevent the carbon fiber material from cracking due to concentrated stress, and ensure the accuracy of rim lacing.

Surface Treatment Structure：

Customizable Coating Base Layer: The surface of the rim is provided with a special carbon fiber primer layer, which not only protects the carbon fiber body from ultraviolet rays and water vapor erosion but also provides an adhesion basis for personalized coating. Different colors or patterns of coatings can be sprayed according to requirements, and the coating thickness is controlled at the micron level to avoid increasing weight due to being too thick while maintaining surface smoothness to reduce wind resistance.

Wear-Resistant Protective Layer: A layer of transparent wear-resistant coating is added to local areas where the rim may come into contact with the ground (such as the lower part of the side), improving scratch resistance and prolonging the appearance life.

Application Areas

Application areas for the W50X28TL carbon bicycle rim:

• Road Racing Scenarios:

The 50mm height and 28mm external width of the rim form an aerodynamic structure. Combined with the lightweight feature of carbon fiber (400-490g), it can effectively reduce wind resistance during high-speed riding and improve acceleration efficiency and endurance. At the same time, the symmetrical arc-shaped cross-section enhances lateral support when cornering, making it easier for riders to exert speed advantages in road racing.

• Light Mountain Riding Scenarios:

The disc brake system ensures that the rim can provide reliable braking effect on steep slopes, muddy roads and other conditions in light mountains, ensuring riding safety. The high strength of carbon fiber material and the torsional rigidity of the rim can cope with the impact and pressure in light mountain riding, and the lightweight design will not increase too much burden on riders.

• Long-Distance Riding Scenarios: 

The lightweight rim can reduce riders' physical consumption during long-distance riding, and the low rolling resistance of tubeless tires helps improve riding efficiency. In addition, the durable structure of the rim (such as the stress dispersion of the wave rim, the surface wear-resistant coating, etc.) can cope with various road tests in long-distance riding, allowing riders to focus more on the journey.

Technical Parameters

Customized Weaves & Finishes:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning:

Packing:

W50X28TL Product Show