Alpina Thunder Mountain Bike Helmet 5013-635

Alpina Thunder Mountain Bike Helmet


Rocksolid Guarantee

Shop with confidence. If it's not working out like you expected, you can return it.

Really. If it's not up to snuff after you use it (a couple times) you can still bring it back.

It lasts longer than 30 days, but not forever. We'll be fair about it. We're all members here.

Price match guarantee

Found a better deal in Canada? Up to 30 days after purchase – we’ll match it.

If you see a lower price for this exact item advertised online, in print or in a store, give us a call at 1 (888) 847-0770.

If it’s identical, brand-new, in stock, and sold and shipped by a Canadian-based retailer, we’ll match that price.

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Show Description

Ride in style and secure comfort with a helmet that provides protection for commuters and mountain bikers. The 25 vents keep your head cool, and the front airflow vents have a mesh covering to keep out bugs. Larger size range to fit larger heads, with a secure, comfortable fit.

  • In-mould shell with visor.
  • Scratch-resistant outer material is UV-stable and anti-static.
  • Micrometric retention system.
  • Fly net on front airflow vents.
  • Ratcheting ergomatic chin clip system.