BOLA 40mm Carbon Road Rim | 700C Tubeless, 24mm/25mm Inner Width

Overview: 40mm Carbon Road Rim for Disc Brake Road Bikes

The BOLA 40mm carbon road rim is engineered for performance-focused cyclists seeking lightweight, durable, and aerodynamic wheel builds. With a tubeless-ready, hooked bead design in 700C, and available inner widths of 24mm or 25mm, it supports wider tire profiles ideal for endurance, climbing, and flat-course racing. Four weight options enable tailored setups based on specific use cases.

Key Features and Specifications

• Rim Depth: 40mm V-profile, for aerodynamic stability on flats and robust handling in crosswinds
• Inner Width: 24mm or 25mm, optimized for 25–32mm tubeless or clincher road tires
• Outer Width: 30mm
• Weight Tiers: Extreme Light (360±10g), Ultralight (380±10g), Superlight (400±10g), Normal (435±15g)
• Compressive Strength: >300kg
• Lateral Torsion: >50kg
• ERD: 558mm
• Bead Type: Hooked (tubeless-ready), compatible with standard 6.5mm valve hole tubeless valves
• Tyre Compatibility: Fits 25–32mm road tires (700C)
• Max Rider Weight: 100kg
• Tyre Pressure Range: Min 100 psi, Max 125 psi

Specification Comparison Table

Frequently Asked Questions

• Q: What are the best 40mm carbon road rims for lightweight climbing builds?
  A: The BOLA 40mm Extreme Light and Ultralight variants (360g/380g) are engineered for climbing use-cases, offering very low rim weight with tested compressive/lateral strength.
• Q: Is a 24mm inner wide tubeless rim good for endurance road cycling?
  A: Yes—the 24mm and 25mm width supports 25–32mm tires, providing stability, comfort, and lower rolling resistance for long-distance and mixed road conditions.
• Q: How much do ultralight carbon rims weigh compared to standard alloy road rims?
  A: BOLA’s Ultralight carbon rims weigh 380g, typically 100–200g less than most 40mm deep alloy road rims, without sacrificing structural integrity.
• Q: What should I look for when choosing hooked tubeless carbon rims for a road bike?
  A: Confirm strength testing (BOLA rims: >300kg compressive, >50kg torsion), robust tolerance (<0.15mm flatness), compatible bead seat, and pressure rating for safe tubeless use.
• Q: Are 40mm carbon rims faster than 30mm rims for flat road racing?
  A: 40mm rims, such as these V-profile BOLA models, deliver enhanced aerodynamic benefits over 30mm rims, suitable for sustained high-speed use on flat terrain.

Certifications and Tolerances

• Forward Compressive Strength: >300kg
• Lateral Torsion: >50kg
• Spoke Hole Tension: >280kg
• Flatness tolerance: <0.15mm
• Roundness tolerance: <0.3mm

Real-World Use Case Alignment

• Professional teams: Optimize climbing or all-round setups by selecting variant
• Endurance: Enhance long-distance comfort and handling
• Custom builds: Options for weight reduction or increased durability at value pricing