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100% Altec / Altis MTB Helmet sizing

Size Head (cm)
XS/SM 50-55
SM/MD 55-59
LG/XL 59-63

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How to Measure

  • H Head
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.