• Asymmetric Carbon 27.5 MTB Rim, ultralight design, 30mm inner width, tubeless compatible, featuring UCI logo and warranty.
  • Closeup of Bola 650B carbon MTB rim showcasing tubeless hookless bead and asymmetric offset
  • Detail of hookless tubeless design on 27.5in carbon MTB rim for cross country and trail
  • 650B Hookless Carbon MTB Rim, 27.5" Asymmetric XC, 25mm Internal Carbon Fiber Sporting Goods
  • 650B Hookless Carbon MTB Rim, 27.5" Asymmetric XC, 25mm Internal Carbon Fiber Sporting Goods
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Carbon Fiber Sporting Goods

650B Hookless Carbon MTB Rim, 27.5" Asymmetric XC, 25mm Internal

650B Hookless Carbon MTB Rim, 27.5" Asymmetric XC, 25mm Internal

$310.00 USD
$300.00 USD $310.00 USD
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650B Hookless Carbon MTB Rim – Asymmetric, Tubeless, Lightweight

Summary: Precision-engineered for cross-country and aggressive trail riding, the Bola 650B (27.5") hookless carbon MTB rim weighs 315±10g (superlight) or 380±15g (standard), supports 2.1–2.4" tubeless tires, and features a modern 25mm inner width. Fully ETRTO compliant for tire/rim safety and tested to >280kgf spoke tension. 3-year warranty and OEM customization available for brands and teams.

Key Specifications

Size 650B / 27.5"
Rim Height 30 mm
Inner Width 25 mm
Outer Width 30 mm
Weight 315 ± 10g (superlight); 380 ± 15g (standard)
Profile U-shaped, Asymmetric (offset)
Valve Tubeless Presta (French) valve compatible
Spoke Holes 28/32 available, >280kgf tension
Material Toray unidirectional and woven carbon fiber
Certifications ETRTO 2023, ISO 4210-7

XC & Trail Performance, Verified Compatibility

  • 25mm inner width excels with 2.1–2.4" XC and trail tires, supporting 45–65psi, aligning with modern tire standards.
  • Asymmetric offset design improves spoke angle to balance tension, increasing lateral rigidity and durability for racing and all-mountain use.
  • Hookless tubeless profile reduces pinch flats, supports lower tire pressure, and ensures secure tire fit.
  • Meets ETRTO and ISO industry standards for rim/tire safety and performance.

Comparison Table: 650B Carbon MTB Rims

Bola 650B Ultra XC Comp OEM 650B Pro
Weight (g) 315 / 380 370 400
Inner Width (mm) 25 25 24
Asymmetric Yes No Yes
Rim Height (mm) 30 25 28
Tubeless Hookless Yes Yes Yes
Warranty 3 years 2 years 1 year

FAQs

  • Q: Is a 25mm inner width rim suitable for modern XC and trail tires?
    A: Yes, 25mm inner width accommodates 2.1–2.4" tires, optimizing contact patch and support at lower pressures for cross-country and aggressive trail use.
  • Q: Are hookless rims safe for aggressive riding?
    A: This rim is ETRTO certified, designed for 45–65psi, and tested to >280kgf spoke tension for reliable tubeless performance in racing and trail environments.
  • Q: What is the main advantage of an asymmetric (offset) rim in MTB?
    A: Offset increases spoke tension balance between drive/non-drive sides, improving wheel stiffness and longevity.
  • Q: What tire and hub standards are compatible?
    A: Compatible with 27.5"/650B wheels, ETRTO-compliant tubeless tires (2.1–2.4"), and Boost/non-Boost hubs supporting 28–32 spokes.
  • Q: How does the rim compare with other ultralight 650B options?
    A: The Bola rim offers lower verified weight, ETRTO/ISO compliance, asymmetric design, and OEM customization for brand-focused buyers.

 

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