Bola 650B Asymmetric Carbon Gravel Rim, 30mm Deep, 24/25mm Inner, Tubeless, 330–395g

Bola 650B Asymmetric Carbon Gravel Rim – For Lightweight, High-Performance 650B Builds

Summary: Bola 650B asymmetric carbon gravel rim offers 30mm depth and a choice of 24mm or 25mm inner width for optimal gravel race performance. Suitable for both competitive and endurance cycling, the rim is tubeless ready and available in hooked or hookless designs. Weight ranges from 330g (Ultralight) to 395g (Normal) per rim. Designed for disc brake systems and tire compatibility of 38c to 50c.

Key Features & Technical Details

• Rim Size: 650B (27.5")
• Profile: Asymmetric U-shaped, 30mm deep, 30mm outer width
• Inner Width Options: 24mm or 25mm
• Bead Design: Hooked or hookless options
• Weight Range: 330g (Ultralight), 355g (Superlight), 395g (Normal) ± tolerance
• Effective Rim Diameter (ERD): 540mm
• Material: Carbon fiber (layup optimized for strength-to-weight)
• Tubeless Ready: Yes
• Brake Compatibility: Disc only
• Warranty: 3 years

Comparison Table

Buyer FAQs

• Q: What is the optimal inner width for gravel tires (38c–50c)?
  A: 24–25mm inner width supports a broad range of gravel tires with stable sidewalls and secure tubeless fit.
• Q: Is asymmetric rim design beneficial for gravel bikes?
  A: Yes. Asymmetric profiles improve spoke tension balance and wheel durability, especially under rough-terrain stress.
• Q: Should I choose hooked or hookless for tubeless?
  A: Hookless supports lower pressures, but check your tire maker for compatibility; hooked is more widely compatible.
• Q: How light is too light for competitive gravel riding?
  A: The Ultralight 330g option targets competitors prioritizing acceleration; Superlight and Normal balance weight with durability.
• Q: What standards apply for impact and quality?
  A: This rim exceeds EN 14766 and ISO 4210-7 impact and fatigue standards for off-road wheels.

Use Cases

• Custom wheel builds for racing, endurance, or high-performance gravel bikes.
• Riders needing lightweight but robust rims for mixed or demanding conditions.
• Small or medium cycling brands requiring a versatile, quality-assured carbon rim component.

Note: Design is optimized for high-endurance and racing scenarios but may show more impact deformation at pressure extremes compared with heavier alternatives.