RaceFace

ARC 40 Offset 27.5" Rim 32h Gray

RaceFace ARC 40 Offset 27.5" Rim 32h Gray is a wide, asymmetric aluminum mountain bike rim designed for modern 27.5" trail and enduro tire volumes, with a build-friendly profile that helps create a stronger, longer-lasting wheel. The offset rim bed balances left/right spoke tension, which can improve durability and reduce the tendency for spokes to loosen over hard riding and big impacts.

Built from sleeved 6069 aluminum, the ARC 40 targets riders who want high impact resistance without the weight and cost of carbon. A tubeless-ready bead with secure tire retention supports low-pressure traction and fewer pinch flats (with appropriate tape, valve, and setup).

• Asymmetric (offset) rim bed - More even spoke bracing and left/right tension balance for a tougher, more stable wheel build
• ARC 40 profile (wide rim platform) - Better support for high-volume mountain bike tires, improving cornering stability and sidewall control at trail pressures
• Sleeved 6069 aluminum construction - Strong, impact-resistant alloy with a sleeved joint for dependable real-world durability
• Tubeless-ready bead - Secure tire retention designed for reliable tubeless performance when paired with proper rim tape and valves
• 32-hole drilling - Compatible with common MTB hub options for serviceable, readily sourced wheel builds
• Offset spec - 4.5mm offset for 30/35/40mm versions (ARC 40 uses 4.5mm); 3mm offset for 25mm versions
• What’s not included - Rim tape and tubeless valves are not included