John Doe One Helmet Signature Frozen Black Carbon
- Safety Rating ECE 22.06
- Low stock - 5 items left
- Free Shipping & Returns
John Doe Helmet Sizing Guide
Use this guide to help choose the right size John Doe helmet. Measure around the widest part of your head, approximately 2cm above your eyebrows and around the back of your head.
| Size | Centimetres | Inches |
UK Hat Size |
|---|---|---|---|
| XS | 53–54cm | 20 7/8" – 21 5/8" | 6 5/8" – 6 3/4" |
| S | 55–56cm | 21 1/2" – 21 7/8" | 6 7/8" – 7" |
| M | 57–58cm | 22 1/4" – 22 5/8" | 7 1/8" – 7 1/4" |
| L | 59–60cm | 23" – 23 1/2" | 7 3/8" – 7 1/2" |
| XL | 61cm+ | 23 5/8"+ | 7 5/8"+ |
Certification
John Doe helmets are certified to ECE 22.06 and DOT standards.
Not sure which size to choose? Visit us in store and we can help check the fit properly.
The John Doe One Helmet Signature Frozen Black Carbon combines black and exposed carbon detailing with John Doe's distinctive Signature graphic finish. Built around the JD One's retro-inspired full face design and interchangeable visor and peak system, it offers riders the flexibility to configure the helmet to suit different riding styles while maintaining a classic 70s-inspired look.
Whether fitted with a visor, peak or blanking panel, or worn with optional goggles, the JD One is designed to adapt without compromising comfort or practicality. The Multi-Lock system allows accessories to be changed quickly and easily, giving riders greater freedom to personalise the helmet.
The JD One is supported by a wide range of optional accessories and replacement parts, including visors, peaks, goggles, liners and cheek pads.
ECE 22.06 and DOT certified, the JD One combines modern protection with everyday comfort, making it a versatile full face motorcycle helmet for road, adventure and mixed-use riding.
