The KOIBIKE R46X26TL-UL is a high-performance carbon road wheel with a 46mm rim depth and a rim weight of just 455g (±15g). It's designed for riders seeking the ultimate balance of lightweight and all-around performance. Compatible with tubeless and clincher tires from 25C–42C, the R46X26TL-UL features a widebody construction with a 26mm external width and a 19mm internal width. The wider internal width creates a more natural "U"-shaped tire profile, significantly improving riding comfort and reducing the transmission of road vibrations and the risk of flats. Utilizing advanced Toray T700 and T800 high-modulus carbon fibers, combined with a precision molding process, the wheel achieves exceptionally low weight while maintaining strength, rigidity, and durability. It's an ideal choice for lightweight competition and long-distance endurance riding.

Product Features and Advantages

High-modulus carbon fiber combines lightness and durability.

Weighing only 455g (±15g) per rim, the 46mm rim depth significantly reduces rotational inertia while maintaining carbon fiber rigidity. Utilizing Toray T700/T800 high-modulus carbon fiber, the enhanced rigidity provides a more responsive start and an easier climbing experience. Its excellent impact resistance and structural rigidity meet the demands of bursts on short, steep climbs and continuous ascents.

Widebody rim construction for versatile riding scenarios

The modern widebody design, with a 26mm external width and a 19mm internal width, optimizes tire sidewall support and contact patch, making it compatible with 25C–42C clincher and tubeless tires. The wider rim shape not only improves grip and stability, but also allows for lower tire pressures, effectively absorbing road vibrations and significantly enhancing comfort and control confidence on long rides.

Versatile braking rim and drilling options for greater flexibility

Equipped with a CNC-machined carbon brake rim, the rim's edge is highly flat and adheres closely to the brake pads, ensuring stable, linear braking in both wet and dry conditions. Standard symmetrical and offset spoke hole options are available for custom wheel builds, facilitating balanced tension and improving overall stiffness, especially for high rear wheel loads.

Versatile, versatile upgrade

Recommended for riders weighing 55–95kg, it's perfectly suited for road races, endurance riding, gravel exploration, and everyday training. Whether you're looking for speed in competitive settings or comfort-conscious long-distance travel, the R46X26TL-UL provides reliable and comprehensive performance.

KOI BIKE | A leading carbon wheel manufacturer with 10 years of experience, we specialize in the R&D and production of high-performance carbon fiber wheels, leveraging our engineering expertise to create reliable cycling equipment.

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

Frame and Width Design: 

The 46mm high frame features a streamlined curved design to reduce airflow impact. The 26mm external width is balanced with the 19mm internal width. The internal width accommodates the bead of 23-42cm tires, while the external width reduces drag through smoothly transitioning sides, balancing aerodynamics with ETRTO compliance.

Brake Rim Construction: 

The rim edge features a flat design specifically designed for 23-42cm tubeless and clincher disc brakes. The surface is precision-polished to minimize flatness tolerance, ensuring uniform contact with the brake pads. The material is a heat-resistant carbon fiber composite to withstand high-temperature fluctuations during braking.

Spoke Holes and Reinforcement Structure: 

Carbon fiber patches are used for reinforcement to minimize weight while ensuring uniform spoke hole distribution. Thickened carbon fiber is laminated around the holes to form a reinforcement ring, enhancing spoke tension resistance and achieving a pull-out strength of ≤300kg. Combined with the 700cm rim diameter, this ensures high concentricity after assembly.

Overall Material and Craftsmanship: 

The frame is constructed from a single piece of carbon fiber composite material. The stacking direction is optimized for frame force distribution. This improves the frame's torsional and deformation resistance within a lightweight range of 455±15g, balancing durability and riding feedback.

Application Areas

The KOIBIKE R46X26TL-UL rim excels across diverse riding conditions, thanks to its lightweight build, structural stiffness, and wide, comfort-optimized design:

Long-Distance Rides & Endurance Racing: 

The ultra-light rim reduces rotational mass, minimizing fatigue over hours in the saddle. Paired with tubeless tires, it delivers superior vibration damping, enhancing both comfort and efficiency on century rides or endurance events.

Rolling Hills & Mixed Terrain: 

The 46mm depth strikes a perfect balance—light enough for efficient climbing, yet deep enough to provide aerodynamic benefits on descents and flat sections, ideal for rhythm-based riding.

All-Weather Road Cycling: 

With moderate depth and excellent crosswind stability, it performs reliably in changing conditions, making it a confident choice for spring/fall training, commuting, or unpredictable weather.

Paved & Light Off-Road Mixed Surfaces (Gravel Lite): 

The 19mm internal width and tubeless readiness allow easy fitment of 32c+ tires, enabling smooth transitions from asphalt to gravel, dirt paths, or rough pavement, perfect for adventure rides.

High-Performance Wheel Upgrade: 

An ideal upgrade from stock wheels, offering a significant performance boost in speed, responsiveness, and ride quality without compromising durability.

Whether tackling a weekend epic, a club gran fondo, or exploring hidden backroads, the R46X26TL-UL is your versatile, high-performance companion.

Technical Parameters

Customized Weaves & Finishes:

Customized Laser Engraving Brake Track:

Customized Holes:

Weight Check:

Clean burrs ＆ residues

Rim Diameters Check:

Cleaning & Packing

 R46X26TL-ULProduct Show