Ultra-wide silicone-backed strap stays put

2mm diameter

50mm valves will fit max 28mm deep rims

tire beads often slip below the rim edge and are difficult to pull out

The Soft compound provides a very high level of tackiness and good shock absorption

Fox Mainframe MIPS Helmet - S - Trvrs Emerald Out of Stock Ultra-wide silicone-backed strap stays putThe Mainframe MIPS Helmet gives you exactly what you're looking for in an affordable helmet: proven safety features combined with easy trail style. Featuring extended coverage to protect more of your noggin', the proven MIPS impact protection will keep your brain safe in the event of a crash by absorbing and redirecting energies and forces that could otherwise damage it. With a lightweight fit system, the Mainframe MIPS Helmet will also keep you cool,