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509 Altitude 2.0 Carbon Fiber Helmet

509 Altitude 2.0 Carbon Fiber Helmet

4.7· 437 ratings

Best price now

$319.96at 509Observed at 1:03 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the 509 Altitude 2.0 Carbon Fiber Helmet

The 509 Altitude 2.0 is an off-road helmet with a carbon fiber shell, sold in sizes up to 2XL and certified to both DOT and ECE standards. It is aimed at dirt riders, snowbike riders and dual-sport riders who want a light shell and a goggle-friendly opening. The best new price is $242.68 at eBay as of November 4, 2026, with three stores listing it new. That sits at the low end of what this carbon model typically sells for, since carbon-shell helmets usually run well above $300.

Best forDirt and trail ridersSnowbike and winter ridersDual-sport riders who want a light helmetRiders with larger head sizes needing 2XL
Pros
  • Carbon fiber shell keeps weight down
  • DOT and ECE certified for road and off-road use
  • Wide goggle-friendly eyeport
  • Available up to 2XL
  • Strong owner rating of 4.7 out of 5 from 437 ratings
Cons
  • Carbon shell costs more than polycarbonate helmets
  • Off-road design means no face shield or pinlock
  • Peak and vent parts add maintenance
  • Fit varies, so sizing up may be needed

509 Altitude 2.0 Carbon Fiber Helmet prices at every store

  • 509New

    In stock

    $319.96Observed at 1:03 PM
    Visit store
  • SnowBigDealNew

    In stock

    $319.97Observed at 1:03 PM
    Visit store

Also available at

  • eBayCheck price at eBay
  • Bob's Cycle SupplyCheck price at Bob's Cycle Supply
  • Dennis KirkCheck price at Dennis Kirk
  • RevZilla.comCheck price at RevZilla.com
  • SnowMobile GearCheck price at SnowMobile Gear

509 Altitude 2.0 Carbon Fiber Helmet price history

Lowest price we've seen: $239.97 on Nov 4 at RevZilla.com. Tracked across 9 stores since Nov 4.

What reviewers say

Owners rate the Altitude 2.0 highly, with 4.7 out of 5 across 437 ratings. Most praise the light weight and comfortable fit for long rides, while a few mention sizing and wind noise.

Pros
  • Light feel on long rides
  • Comfortable liner and fit
  • Good ventilation
  • Solid build quality
Cons
  • Runs small for some riders
  • Wind noise at speed
  • Peak can vibrate in strong wind

Specifications

Style
Off-road
Department
Men's / Unisex
DOT Certified
Yes
ECE Certified
Yes
Size
2XL

Questions and answers

Is the 509 Altitude 2.0 worth it at $242.68?
Yes, if you want a carbon-shell off-road helmet. That is a low price for carbon, which usually starts above $300. At $242.68 at eBay as of November 4, 2026, it is a strong value.
Is it DOT and ECE certified?
Yes. The helmet carries both DOT and ECE certifications, so it meets US road and European standards.
Does it work with goggles?
Yes. It is an off-road helmet with a wide eyeport made for goggles. It does not come with a face shield.
How does it compare to the original Altitude?
The 2.0 updates the shell and ventilation over the first Altitude. It keeps the same off-road focus and goggle fit.
What sizes are available?
Sizes run through 2XL, and the 2XL is listed here. Check the 509 size chart, since some riders report the fit runs small.
When is it cheapest?
Carbon helmets tend to drop during end-of-season and clearance sales. The current $242.68 at eBay as of November 4, 2026 is already near the low end.
Where is the 509 Altitude 2.0 Carbon Fiber Helmet cheapest?
At 509, for $319.96, as of our latest check.
What do buyers say about the 509 Altitude 2.0 Carbon Fiber Helmet?
Rated 4.7 out of 5 from 437 ratings.
Where can I buy the 509 Altitude 2.0 Carbon Fiber Helmet?
7 stores we checked sell it, including 509, SnowBigDeal, eBay, Bob's Cycle Supply, Dennis Kirk.

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