KOIBIKE's 45mm lightweight disc brake road rim is developed and manufactured by our own independent R&D and manufacturing facility. As the original manufacturer, we have many years of experience in carbon fiber rim manufacturing and a stable supply chain, enabling us to meet the bulk purchasing needs of B2B customers. Crafted from high-quality carbon fiber (with optional Japanese Toray carbon fabric), these wheels feature a 45mm rim depth for optimized aerodynamics, a 21mm internal width suitable for tires 23-47C, a 30mm outer width for reduced drag, and a 28mm brake track for optimal heat dissipation and braking safety. The rims maintain a weight of 360±15g per lap, achieving a balance of lightweight and rigidity. Thousands of impact tests have proven the rims will not crack or deform, and they are suitable for riders weighing 120kg or less. The UD paint finish is scratch-resistant and sun-resistant, offering both practicality and a premium look. Customizable designs are also available. The factory offers customization options for spoke hole count and carbon fabric type, serving professional teams, bicycle manufacturers, and the custom wheel market with reliable quality and flexible supply.

Product Features and Advantages

Aerodynamic and lightweight balance: 

The 45mm rim depth reduces drag, and the lightweight design of 360±15g reduces inertia, lowering friction with the tire for improved grip, acceleration, and climbing speed. 

Wide Tire Compatibility: 

The 21mm internal width accommodates tires sized 23-47cm, meeting the needs of various road and light gravel riding surfaces, and supports a maximum tire pressure of 120psi.

Reliable Braking: 

The 28mm brake track provides ample heat dissipation to prevent thermal fade from continuous braking, ensuring safe high-speed riding.

Durable and Beautiful: 

The UD paint finish highlights the carbon fiber texture and undergoes a multi-layer process to resist scratches and UV rays, extending the life of the exterior.

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

Spoke Hole Design: 

Available in common sizes such as 20/24 holes, with customizable spoke sizes of 16/18/20/21/24/28/32/36H. The reinforced hole placement ensures even tension distribution, compatibility with various lacing methods and most hub models on the market.

Rim Appearance: 

The UD paint finish covers the entire rim, with a clearly visible carbon fiber texture and a smooth, wear-resistant surface. It offers stable performance while maintaining both industrial aesthetics and practicality. Brake rim construction:

 Designed specifically for 28mm-wide disc brakes, the material is heat-resistant and features a flat surface for a stable fit during braking.

Rim construction: 

45mm rim depth with a 30mm outermost streamlined rim. The optimal size creates a pleasant visual experience. The carbon fiber layup enhances rigidity, while the lightweight design improves deformation resistance.

Application Areas

Application areas for the D45X28TL-UL carbon bicycle rim:

Road Racing and Training: 

The aerodynamic design and lightweight weight are suitable for flat-road sprints and daily high-intensity training, improving cycling efficiency.

Long-Distance Cycling: 

Wide tire compatibility is suitable for mixed-surface riding, while durable construction and reliable braking ensure long-distance safety.

Recreational and Fitness Cycling: 

Strives for both speed and comfort, while the UD paint finish is ideal for personal display, satisfying both aesthetic and performance needs.

Custom Wheel Market: 

Customizable spoke holes and carbon fiber patterns are supported, suitable for mass production by bicycle manufacturers or DIY wheel assembly.

Technical Parameters

Customized Weaves & Finishes:

Customized Laser Engraving Brake Track:

Customized Holes:

Weight Check:

Clean burrs ＆ residues

Rim Diameters Check:

Cleaning & Packing

D45X28TL-UL Product Show