Road Bike Wheelset Rim Brake

The D40X30TL/HL-650B-UL ultra-lightweight disc brake road wheel is designed for 27.5-inch (650b) wheels, featuring a UD paint finish that exudes a carbon fiber texture. Its 40mm rim depth and 30mm external width provide aerodynamic balance, while its 24mm internal width accommodates a wide range of tires. The straight rim is designed for tubeless tyres, while the hooked rim is compatible with both tubeless and clincher tyres. The 30mm braking rim provides stable braking, and at an ultra-lightweight weight of 345±15g, the ETRTO bead seat diameter precisely matches the 521mm ERD, enhancing riding efficiency and compatibility. 650b road wheelset rim brake/27 inch road bike rims/27 inch road bike rims

This 45mm lightweight disc brake road rim is made from Japanese Toray carbon fiber cloth for enhanced rigidity and lightweight performance. Its UD paint finish creates a simple carbon texture, balancing durability with visual appeal. Its 21mm internal width is compatible with tires from 23-47cm, making it suitable for a wide range of riding situations. Its 30mm outer width, combined with a 45mm rim depth, provides ample heat dissipation while balancing aerodynamic performance and maneuverability. The 28mm brake track is specifically designed for disc brakes, ensuring stable and rapid braking while minimizing rim damage. Its lightweight design, with a single-turn weight of 360±15g, reduces rotational inertia for more agile climbing and acceleration, making it ideal for both racing and training.

Unlike "full-height" rim designs that pursue the ultimate in low drag, the 55mm rim depth represents a rational aerodynamic approach: it doesn't attempt to beat a 90mm deep rim in a wind tunnel, but rather precisely targets the 20–45 km/h speed range most frequently encountered in real-world riding. By optimizing the leading edge curvature and trailing edge breakaway point, this achieves delayed airflow separation. Combined with a 21mm internal width that optimally supports modern 25–28cm tires, this creates a "bead-to-bead aerodynamic profile" that maintains steering neutrality at crosswind angles of 10°–15°, reflecting the design shift from "data-first" to "perception-first." With a 21mm internal width and a 31mm outermost width, the streamlined profile features uniform Toray carbon fiber layup, ensuring a low-drag profile for optimal grip and stability. The 28mm brake track is designed specifically for disc brakes, combining heat resistance with ample heat dissipation to minimize thermal decay from continuous braking. The low weight of 420±15g per lap is achieved thanks to its high modulus, low moment of inertia, and agile acceleration on hills. The gold marble-patterned finish, treated with a multi-layer UV treatment, matches the carbon fiber's texture and is scratch- and UV-resistant, showcasing its lightweight, aerodynamic, and premium feel for both racing and training.

Tubular 50mm Deep × 26mm Internal Width Carbon Tubular Rim 1. Ultra-Lightweight Construction 375g ±15g per rim – Exceptional strength-to-weight ratio for explosive acceleration and climbing efficiency, engineered for competitive riders. 2. Pro-Level Durability 300kg max spoke tension – Withstands extreme loads while maintaining structural integrity. 3. Versatile Tire & Pressure Range Fits 23C–42C tubular tires | 120–150psi optimal pressure – Ideal for road races, endurance events, and mixed-surface riding. 4. Enhanced Spoke Hole Options Symmetrical & offset drilling – Offset pattern boosts rear-wheel lateral stiffness by 18% for efficient power transfer. 5. 26mm Internal Width Optimizes tire profile for: Grip – Wider contact patch/Comfort – Reduced vibration transmission/Aero – Smother airflow transition