![]() |
![]() |
![]() |
|
Fulmer Full Face Helmets | 901 SV Modular | 601 SV | 152 Ace |
Closure Type | Quick release retention system | Quick release retention system | Quick release retention system |
DOT Approved | Yes | Yes | Yes |
Sizes | S-2XL | S-2XL | XS-2XL |
Warranty | 1 Year | 1 Year | 1 Year |
Sale!
Fulmer
Add to wishlist
152 Ace Helmet
Fit: True to Size
- When searching for a premium value helmet. Consider the Ace helmet from Fulmer. This lightweight helmet features an aerodynamic design which reduces drag. Adjustable chin and top of helmet vents as well as rear exhaust offer advanced ventilation to keep you cool. This Fulmer full face helmet with QR4 quick-release shield system will have you always reaching for the top.
- DOT Approved
- Lightweight thermoplastic shell
- Plush comfortable fit
- Quick release retention system
- Advanced ventilation system
- Two shell sizes XSM-MED and LRG-2XL
- Medium helmet weight approximately 1525g / 3.40 lbs
Size Guide
How To Measure
This sizing chart is simply a starting point. Head shapes vary – For the best fit, helmets should be fitted to you by an authorized Castle X dealer.How To Measure:
For the most accurate sizing, have someone else take your measurements making sure the measuring tape is snug but not tight against your head.
- Start Here:
Start by measuring the circumference around your head at the temple, just above the eyebrow line (approximately one inch above eyebrows) using a soft tape measure. Then select the helmet size that is closest to your head from the size chart. If your head falls between two helmet sizes, start by trying on the smaller of the two sizes.

Adult | X-Small | Small | Medium | Large | X-Large | 2X-Large | 3X-Large | 4X-Large |
---|---|---|---|---|---|---|---|---|
Centimeters | 53-54 | 55-56 | 57-58 | 59-60 | 61-61.5 | 62-62.5 | 63-64 | 65-66 |
Hat Size | 6.5-6.75 | 6.75-7 | 7-7.25 | 7.25-7.5 | 7.5-7.75 | 7.75-8 | 8-8.25 | 8.25-8.5 |
Inches | 21-21.25 | 21.5-22 | 22.5-22.75 | 23.25-23.5 | 23.5-24 | 24-24.5 | 24.5-25.25 | 25.25-26 |