The Damco 27.5" Alloy Black Rear Freewheel Quick Release Double Wall Wheel is a highly convenient repair and replacement option engineered for mid-to-entry level 27.5-inch (650B) mountain bikes and multi-speed hybrid commuters. By combining a classic threaded multi-speed freewheel interface with a tool-free quick-release axle system, it provides an optimal balance between straightforward, budget-conscious drivetrain repair and ease of maintenance.

Key Technical Specifications

• Rim Configuration:
  • 27.5-inch diameter (ISO 584 ETRTO sizing layout) double-wall aluminum construction.
  • The webbed dual-wall internal reinforcement drastically reduces the likelihood of structural flat spots and "tacoed" rims from trail or urban impacts.
• Hub Type:
  • Threaded spin-on freewheel hub shell.
  • Explicitly engineered to thread directly onto standard multi-speed 5-speed, 6-speed, or 7-speed thread-on freewheel gear blocks (not compatible with modern push-on cassette gear sets).
• Axle Configuration:
  • Hollow quick-release (Q/R) 10x135mm axle system.
  • Includes a matching external quick-release skewer mechanism allowing for tool-free wheel removal during transport or flat repairs.
• Brake Surface:
  • Built with CNC-machined alloy sidewalls optimized for direct contact with traditional linear-pull V-brakes, mechanical cantilever systems, or caliper rim brakes.
• Wheel Build:
  • Spoke architecture includes a 36-spoke count, laced in a reliable 3-cross pattern to distribute drivetrain pedaling torque evenly across the wheel structure.
• Valve Boring:
  • Pre-machined to accept standard high-volume Schrader valves.