This bicycle rim is made of high-modulus T800/T1000 carbon fiber through a precision one-piece molding process. It not only endows the rim with excellent structural strength but also achieves an ultra-light weight of only 380g. The carbon fiber material itself has an extremely high strength-to-weight ratio, which can greatly reduce the burden on the rim while withstanding various impacts and pressures during riding, ensuring that the rim maintains stable performance during long-term use. The specification of 45mm in height and 28mm in outer width, combined with the characteristics of carbon fiber, ensures excellent aerodynamic performance while taking into account the practicality of daily riding. Whether it is high-speed sprinting or riding under complex road conditions, it can handle it calmly.

At the same time, the rim incorporates a unique wave design. This undulating contour is not just a simple exterior decoration but the result of aerodynamic optimization. The wavy contour can effectively sort out the airflow around the rim, reduce air resistance, improve the wind-breaking performance of the rim, and make it easier for riders to move forward at high speed. In addition, the wave design also enhances the crosswind stability of the rim. When encountering crosswinds, it can disperse the impact of airflow on the rim, reduce the shaking of the rim caused by crosswinds, and improve riding safety and controllability.

It offers two design options: Hookless and Hooked, to adapt to different usage needs and tire types.

In terms of personalized customization, the rim features a UD carbon fiber appearance and supports personalized customization of coatings and the number of spoke holes, which can fully meet users' personalized needs.

In terms of compatibility, this rim is recommended to be installed with tires of 25-47C size, suitable for various riding scenarios. At the same time, it adopts a disc brake design to ensure the braking effect during riding.

Product Features and Advantages

High-Performance Carbon Fiber Construction:

Crafted from high-modulus T800/T1000 carbon fiber via precision one-piece molding, the rim achieves an ultra-light 380g weight while delivering exceptional structural strength. Its high strength-to-weight ratio minimizes burden during rides, resists impacts and pressures, and ensures long-term stability—ideal for both high-speed sprints and complex road conditions.

Aerodynamic Wave Design:

The unique undulating wave contour is engineered for aerodynamic efficiency: it streamlines airflow around the rim to reduce drag, enhancing wind-breaking performance for easier high-speed riding. Additionally, it boosts crosswind stability by dispersing airflow impact, reducing shaking, and improving overall safety and control.

Dual Design Versatility:

Available in both Hookless and Hooked configurations to cater to diverse needs—whether for specific tire types or riding preferences.

Personalized Customization:

Features a UD carbon fiber finish and supports tailored coatings (e.g., colors, textures) and spoke hole counts, allowing users to create a truly unique rim.

Broad Compatibility & Safety：

Recommended for 25-47C tires, making it suitable for multiple riding scenarios. Equipped with a disc brake design to ensure reliable braking performance.

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

Core Material Composition:

Made of high-modulus T800/T1000 carbon fiber fabric via one-piece molding. The carbon fiber matrix with optimized fiber orientation ensures uniform stress distribution, balancing longitudinal rigidity (for power transfer) and lateral strength (for impact resistance). High-strength epoxy resin bonds the layers, forming a dense, lightweight structure.

Contour & Profile Design:

Features a 45mm height and 28mm outer width—balancing aerodynamic efficiency and handling agility, while supporting 25-47C tires for better cornering grip. The undulating wave-shaped sidewalls enhance aerodynamics, absorb vibrations, and improve ride comfort without sacrificing rigidity.

Edge Configurations:

Hookless Version: Smooth, hook-free edges with reinforced carbon fiber layup eliminate stress concentration, creating a tighter tubeless seal for better air retention and fewer pinch flats.

Hooked Version: Traditional hook-shaped edges secure tires, compatible with tubed/tubeless setups. Extra carbon fiber reinforcement allows it to withstand high pressures (up to 150psi) for racing.

Rim Bed & Spoke Hole Details：

The precision-machined, flat rim bed ensures even tire seating and optimal tubeless sealant distribution. Spoke holes (20-28, customizable) are strategically positioned with carbon fiber inserts to resist stress from tension, balancing stiffness and weight.

Disc Brake Integration：

A dedicated interface (compatible with center-lock and 6-bolt systems) in the hub flange area is reinforced with extra carbon fiber layers. This withstands braking forces, ensuring stable power transmission and heat dissipation during prolonged use.

Application Areas

Application areas for the W45X28TL carbon bicycle rim:

• Road Racing:

With its high-modulus carbon fiber construction (lightweight 380g) and 45mm aerodynamic profile, the rim excels in road races. The wave-shaped sidewalls reduce wind resistance, while the 28mm width paired with 25-28C tires enhances speed and cornering stability—ideal for sprints and time trials where every second counts.

• Training and Daily Commuting:

The balanced rigidity and lightweight design make it suitable for regular training sessions, reducing rider fatigue. Its customizable spoke holes and coatings also appeal to commuters seeking a blend of performance and personal style for daily city rides.

• Triathlons and Multisport Events: 

The aerodynamic wave contour and high-pressure tolerance (up to 150psi with the Hooked version) align with triathlon demands, where speed and efficiency are critical. The tubeless compatibility minimizes maintenance, ensuring consistent performance across swim-to-bike transitions.

Technical Parameters

Customized Weaves & Finishes:

Customized Holes:

Weight Check:

Clean burrs ＆ residues:

Rim Diameters Check:

Cleaning:

Packing:

W45X28TL Product Show