You're going to LOVE the fit. Try it on and experience our perfect fit. If you don't love it, send it back in new and unused condition within 30 days for an exchange or full refund*. Risk free.
Gloss Finish
We offer Free Shipping on all orders over $99 within the US. During select promotions & holidays we will offer Free Shipping on all orders within the US.
We have a very easy 30-day Return Policy! Please submit a Customer Support Ticket to get a Return Authorization so we can process your return or exchange.
We stand behind our products – the 509 industry leading warranty covers every product we make in a variety of ways.
At 509 we use the best SSL certificate and the most trusted payment processors provided by Shopify Payments – so you will be able to buy safely and securely.
Sacrifice nothing with the next-generation comfort and performance of the bestselling 509 Altitude 2.0 Offroad Carbon Fiber Pro Helmet. Elevated in every respect, it features the MIPS Brain Protection System for the highest levels of safety. Hand lay-up carbon fiber composite construction makes it lighter, stronger, and sleeker than anything before it. A precisely engineered fit and innovative venting keep you cool and comfortable while the Fidlock® magnetic strap buckle makes for easy one-handed operation.
Key Features
- Hand lay-up carbon fiber composite construction
- XS to 4X sizes available in three shells for optimal fit and minimal weight
- Upper vents for optimal airflow - Hi-Flow
- Go-Pro® mounting capability, improved design
- Fidlock® chinstrap strap closure for easy in and out
- MIPS Mips® (Multi-Directional Impact Protection System) is a revolutionary technology that enhances helmet safety by reducing rotational motion during oblique impacts.protection
- Perfect fit between helmet eyeport and 509 goggles
- 509 helmet bag included
- California Prop 65
Specs
- Weight: ECE helmet as low as 1070 grams
Size Guide
Not sure about your size? Try on at your local dealer!
*Street Helmets are a tighter fit due to cheekpad compression, however, they do pack out over time/use.
Scroll to the right to see more sizes
| Size | US Hat Size | Inches | Centimeters |
|
X-Small |
6 5/8 - 6 3/4 |
20 7/8 - 21 1/8 |
53 - 54 |
|
Small |
6 7/8 - 7 |
21 5/8 - 21 7/8 |
55 - 56 |
|
Medium |
7 1/8 - 7 1/4 |
22 1/2 - 22 5/8 |
57 - 58 |
|
Large |
7 3/8 - 7 1/2 |
23 1/4 - 23 1/2 |
59 - 60 |
|
X-Large |
7 5/8 - 7 3/4 |
24 - 24 1/4 |
61 - 62 |
|
2X-Large |
8 |
24 3/4 - 25 |
63 - 64 |
|
3X-Large |
8 3/4 |
25 1/4 - 25 3/4 |
64 - 65 |
|
4X-Large |
9 |
26 - 26 1/4 |
66 - 67 |
|
Youth Small |
6 |
18 1/8 - 18 7/8 |
47 - 48 |
|
Youth Medium |
6 1/8 - 6 1/4 |
19 1/4 - 19 5/8 |
49 - 50 |
|
Youth Large |
6 3/8 - 6 1/2 |
20 - 20 1/2 |
51 - 52 |