The Gloss Black Spectrum graphic is now available in Biltwell’s Bonanza helmet. The Bonanza Helmet is an open face helmet that infuses modern comfort with a hand-stitched, removable moisture-wicking liner. DOT approved with 3 snaps that accept most bubble face shields.
- Injection-molded ABS outer shell with hand-painted finish
- Expanded polystyrene inner shell
- Hand-sewn removable brushed Lycra liner with contrasting diamond-stitched quilted open-cell foam padding
- Rugged plated steel D-ring neck strap with adjustment strap end retainer
- DOT approved
Sizing Chart
| Head Shape |
|---|
![]() ![]() |
| Sizing Chart | ||
|---|---|---|
| Helmet Size | Inches | Centimeters |
| XS | 20 7/8″ – 21 3/8″ | 53 – 54.25cm |
| S | 21 1/2″ – 22″ | 54.5 – 55.75cm |
| M | 22 1/8″ – 22 5/8″ | 56 – 57.25cm |
| L | 22 3/4″ – 23 1/4″ | 57.5 – 58.75cm |
| XL | 23 3/8″ – 23 7/8″ | 59 – 60.25cm |
| XXL | 24″ – 24 1/2″ | 60.5 – 61.75cm |
View AllClose














Reviews
There are no reviews yet.