UCI New Regulations and KOIBIKE-D65X30TL

1. Background of the new regulations release: In 2025, the Technical Specification for Road and Mountain Bike Event Equipment (2025-2026 Edition) was issued, and adjustments to wheel-related clauses directly affect the R&D direction of equipment.

2. Rim height regulations for road events:

• Limit: Maximum height of 65mm

• Implementation time: Effective from January 1, 2026

• Technical objective: Optimize the aerodynamic cross-section of the rim, reduce crosswind disturbances, and improve handling stability

3. Tire width regulations for road events:

• Limit: Maximum width of 31mm (measured based on static width under a tire pressure of 65psi)

• Implementation time: Officially effective now

• Significance: Provide a clear compliance basis for the application of wide tires in events

1. Transmission system testing:

• Time: Fourth quarter of 2025

• Content: Test the maximum gear ratio of 54x11 in a UCI WorldTour event in Europe

• Key evaluation: Transmission stability and energy efficiency conversion under high-speed conditions (≥60km/h)

2. Classified control of wheel sizes:

• Mountain Bike XCO World Cup: 32-inch wheels (812.8mm in diameter) are permitted to promote technological innovation in complex terrains

• Road events (including time trials): 32-inch wheels are explicitly prohibited to avoid fairness issues caused by size differences

3. Component compatibility and modification regulations:

• Fork width: The maximum internal width of road/track bike forks is uniformly 115mm (measured 50mm below the fork crown)

• Equipment modification: Modifications related to structural strength and aerodynamic shape (such as rim drilling, fork leg cutting) require UCI certification and are prohibited without approval

1. Core parameters accurately matching the new regulations:

• Rim height: 65mm, which exactly meets the maximum rim height limit for UCI road events, allowing participation without structural modifications

• Width design: External width of 30mm (compatible with the 31mm tire width limit) and internal width of 24mm (optimizes tire contact area, improves dry/wet grip, and ensures sidewall deformation ≤1.2mm per 100N load)

2. Practical advantages brought by carbon fiber material:

• Material grade: T800-grade carbon fiber with one-piece molding process

• Balance of lightweight and stiffness: Single rim weight of 500g (excluding spokes and hubs), with radial stiffness ≥35N/mm and lateral stiffness ≥18N/mm

Safety and durability:

• Passed the UCI 40J vertical impact test (no cracks, radial runout variation ≤1mm)

• Low thermal conductivity (≤0.15W/m·K) reduces heat transfer from disc brakes and prevents performance degradation due to high temperatures

• Reinforced bead seat (2.2mm thick), with impact resistance 20% higher than ordinary designs (verified by third-party testing)

3. 2026 upgrade plan (under R&D):

• Material upgrade: Replacement with T1100-grade high-modulus carbon fiber

• Performance goals: Maintain stiffness while reducing weight by 5%-8%, and optimize the aerodynamic shape to reduce the aerodynamic drag coefficient by 8%

• Timeline: Planned to launch the new version in the first quarter of 2026