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.
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The 509 Tactical Helmet is born from a desire to offer industry-leading protection at an affordable price. The absolute best value out there, it goes beyond the basics with a lightweight precise fit, durable polycarbonate outer shell, and revolutionary features like neck brace compatibility. A removable cold weather breathbox and adjustable ventilation adapt to any weather. And like our highest-end helmets, it pairs perfectly with 509 goggles for a seamless fit that maximizes performance.
Key Features
- Polycarbonate blend Shelll
- Comes standard with our new Pro Series Liner and Cheekpads
- Removable vent stoppers for customized ventilation
- One piece eyeport trim
- Revolutionary neck brace ready shell profile
- Custom fit EPS, specially designed for North America
- Special designed expanded polyurethane chin insert
- Removable, washable premium liner
- Removable breath box
- Dual density, interlocking EPS
- Secure double D-ring closure
- Universal camera mount capable
- WARNING for California Residents
Specs
- Helmet Certification: DOT & ECE 22.05
- Starting Weight: 1,300 grams
- Best Head Shape: Intermediate oval fit
- Size Range: XS - 2X
- Shell Breaks:
Medium shell - XS, SM, MD
Large Shell - LG, XL, 2X - Included items: 509 helmet drawstring bag, breathbox, 509 Sticker
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.
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