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For long rides in the cold, the 509 Delta V Carbon Ignite Helmet has you covered—now available in sizes 2X through 4X. Built from hand-laid carbon for lightweight, durable protection, this helmet is engineered for extreme conditions. Its secret weapon? A heated visor that keeps your shield fog-free, paired with Venturi Vents that pull out moist air while keeping cold air out. Designed for long days behind the bars, this helmet delivers warmth, clarity, and comfort in a larger fit.
Key Features
- Helmet purpose-built for head sizes 2X-4X
- Ignite Ignite Technology features a built-in heating element within the helmet shield or goggle lens, designed to regulate temperature and prevent condensation, thereby eliminating foggy vision.dual pane heated shield for fog-free performance with new shield locks that create the perfect seal
- Powered helmet uses external 12-volt power from either your sled or external power pack
- Hand Lay-up Carbon Fiber Shell – Ultimate protection in a lightweight option
- 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 → Learn More
- Multiple shield options available → Shop Shields
- Built-in breath box
- Rear reflective hits for low light and night riding
- ITO (Indium Tin Oxide) shield coating to prevent surface scratches and fogging
- Fidlock® The Fidlock System is a cutting-edge magnetic chinstrap buckle used in motorsport helmets ensuring quick, secure, closures with one hand and is DOT and ECE compliant.chinstrap
- App-driven customization, software, and feature updates for Apple and Android
- WARNING for California Residents
Specs
- Helmet Certifications: DOT & ECE 22.06
- Starting weight: 1680g
- Helmet Size Range: 2X-4X (Intermediate oval fit)
- Helmet Shell:
Extra large shell - 2X, 3X, 4X - Included Items: 509 Helmet Drawstring Bag and Custom(er) Cheek Pads
Size Guide
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.
