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The award-winning Troy Lee Designs A1 Classic MIPS bike helmet offers superior comfort and protection for all genres of mountain biking.

  • Features

    • Reinforced polycarbonate in-mold shell with EPS liner extends down the sides and back of the head for maximum protection and durability
    • Rotational motion can cause brain injuries; with MIPS, a low-friction layer slides 10 to 15mm in all directions, reducing rotational motion to the brain during impact
    • 8 pressurized intake passages draw in cool air for maximum ventilation; rear vacuum vortex outlets help exhaust and draw heat from head
    • Multipurpose cam-lock adjustable stabilizer
    • Full spectrum adjustable visor
    • Anodized aluminum hardware
    • Certified for the following standards: CPSC 1203, CE EN 1078, AS NZ 2063: 2014


    To find your size, position a tape measure just above your ears and about 1 in. above your eyebrows. Keep the tape level to measure the circumference around the largest part of your head and then find the corresponding size in the Technical specs info.
    View all Troy Lee Designs Mountain Bike Helmets
  • Technical Specs

    Best Use

    Mountain Biking

    Helmet Style

    Mountain Bike

    Helmet Construction


    Shell Material

    Polycarbonate-reinforced shell liner







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