Bontrager Rally WaveCel Mountain Bike Helmet


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Color: Black

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Size: Small

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  • An off-road helmet with WaveCel technology that balances comfort and performance for trail riders who value safety.

    A major advancement in the protection against cycling-related head injuries

    Rally WaveCel is a high-style, high-value off-road helmet with trail-specific features and WaveCel, a leading technology in the protection against cycling-related head injuries.

    WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards that the industry has accepted for over 30 years.

    1. WaveCel is a leading helmet tech designed to absorb linear impacts and rotational energy
    2. Virginia Tech 5 STAR rating
    3. BOA® Fit System lets you easily secure and adjust your helmet fit with one hand
    4. Adjustable visor offers multiple coverage options
    5. LockDown dividers make helmet strap management clean and easy to adjust
    6. Soft, comfortable, and moisture-wicking washable helmet pads
    7. Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership
    8. Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

  • Rally WaveCel mountain bike helmet
    An off-road helmet with WaveCel technology that balances comfort and performance for trail riders who value safety.

    What is WaveCel?
    WaveCel is a revolutionary helmet technology designed to be more effective than traditional foam helmets in protecting against certain cycling-related accidents. Its collapsible cellular structure lines the inside of your helmet and is designed to work like a crumple zone to absorb the force of an impact before it reaches your head.

    A TIME Magazine Invention of the Year
    Our breakthrough WaveCel helmet technology was included in TIME Magazine's list of 100 Best Inventions for making the world better, smarter, and even a bit more fun. Watch the video to learn more about the science behind this revolutionary helmet technology. 

    Virginia Tech validation
    All WaveCel helmets received the highest rating from Virginia Tech's third-party testing facility. This unbiased assessment proved Bontrager's WaveCel helmets to be among the highest level of protection available to cyclists with a 5-STAR rating.

    BOA® fit system
    Easily secure and adjust the helmet fit with just one hand.

    Drop-in coverage
    Extended, back-of-helmet shell offers additional rear protection.

    LockDown strap dividers
    Easily adjust straps to fit perfectly with adjustable, lightweight strap dividers.

    Soft helmet pads
    Super comfortable internal pads wick moisture on hot days and hard efforts and are easy to wash after a full day of fun.

  • Size (head circumference)

    Small (51-57 cm)

    Medium (54-60 cm)

    Large (58-63 cm)

    X-Large (60-66 cm)

    Fit system





    Pad material

    Moisture wicking pads

    Moisture wicking pads

    Moisture wicking pads

    Moisture wicking pads

    Buckle type

    Standard buckle

    Standard buckle

    Standard buckle

    Standard buckle






    **Trek Bikes reserves the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing.

    **Weights are based off pre-production products at time of publication. Weights may vary in final production.

  • Size



    51 - 57 cm

    20" - 22"


    54 - 60 cm

    21" - 24"


    58 - 63 cm

    23" - 25"


    60 - 66 cm

    24" - 26"

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