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.
Free US Shipping
We offer Free Shipping on all orders over $99 within the US (excludes Alaska). During select promotions & holidays we will offer Free Shipping on all orders within the US.
100% Secure Checkout
At 509 we use the best SSL certificate and the most trusted payment processors provided by Shopify Payments.
Key Features
Communication Ready
Designed for 509’s Universal Communication System (UCS) Module integration and easy assembly built to enhance your riding experience (sold separately)
Venturi Venting
Innovative Venturi Venting System pulls moist air out without cold wind coming in the helmet
ABS Polycarbonate Construction
Built from ABS Polycarbonate ensuring both strength and a lightweight feel for maximum protection
Fidlock Magnetic Chin Strap
Comes standard with Fidlock® easy-open magnetic strap clasp
Drag
The 509 Tactical 3.1 MTN Helmet delivers bold style, Cardo UCS communication compatibility, and advanced ventilation for peak mountain performance. Stay connected, cool, and protected on every ride.
Key Features
- Cardo UCS Compatible – Communicate with fellow riders and listen to music. This helmet is 509 UCS Edge and Spirit module made by Cardo ready (sold separately)
- Innovative Ventilation – Featuring 509’s Venturi Venting system that passively wicks sweat and moisture away. Three (3) intake vents and two (2) exhaust vents for optimal airflow
- Injection molded ABS shell – Combining a balance of protection and minimal weight
- Removable liner & cheek pads – A plush interior that's easy to adjust for fit and remove for washing
- Fidlock® magnetic chinstrap – Convenient adjustable closure for easy on and off
- WARNING for California Residents
Specs
- Certified: DOT & ECE 22.06
- Starting Weight: 1250 grams
- Best Head Shape: Intermediate Oval
- Size Range: XS – 4X
- Shell Breaks: Small Shell – XS / Medium Shell – SM, MED, LG, XL / 2X Shell – 2X, 3X, 4X
- Includes: Chin bar vent plugs and chin curtain (installed)
- Universal Camera Mount
- Adjustable Polycarbonate Visor
- Nutsert Attachment Points: For accessories (sides of helmet)
- Includes: 509 Helmet Drawstring Bag
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.
How to Measure
When measuring your head, use a cloth tape. Start it just above your eyebrows and circle it around the thickest point in the rear of your head and then reference the size guide below.
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 |
Pressure Points
When trying on a helmet, take note of any pressure points on your forehead—a sign that the helmet is too round. Pressure points on the sides of your head indicate a helmet is too oval for the shape of your head. After you buy a new helmet, try wearing it for 30 to 45 minutes to check for pressure points before using it on a ride.
Pressure Points
When trying on a helmet, take note of any pressure points on your forehead—a sign that the helmet is too round. Pressure points on the sides of your head indicate a helmet is too oval for the shape of your head. After you buy a new helmet, try wearing it for 30 to 45 minutes to check for pressure points before using it on a ride.
