The 509 Tactical 2.0 Enduro Helmet offers the latest in technology and safety from our bestselling Tactical Offroad Helmet family. Innovative features for optimal airflow and comfort combine with industry-leading safety and performance to make this the greatest deal going in dirt. Its unique performance includes Venturi Venting with shutters you can open or close to create negative pressure that pulls moist air out for uncompromising comfort and visual clarity.
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.
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.
Overall rating: 4.9166665 / 5 from 12 reviews.
Review topics: ["helmet"].
"Fits well. Great quality. Light weight. . worn 1 race so far"
"Fits well, overall great helmet!!"
"Came perfect and exactly what i expected."
"very comfortable and high quality"
"Love this helmet. Super light weight for a non carbon. Can put in long days of hard enduro riding and still feels great. Lots of venting so get the heat out."
"Super light and comfortable. I could wear this all day and have zero issues."
"Great helmet for the price. Goggles did fog a bit as I heated up on some techie switch back climbs due to low air flow. I cant complain for fit and finish of the helmet though. I am generally satisfied with 509 products."
"Love love love this helmet. I have a medium biltwell helmet for street bikes and the 509 medium is perfect! I can say the first product photo makes the coral look more pink but it is definitely more orangey, especially compared to the coral Kingpin goggles"
"Fits great, very comfortable, lightweight, and very breathable."
"Fits good, lightweight, comfortable, and looks great"
