HJC Urban jet helmet made of a lightweight fiberglass shell with a trendy design, now ECE 22.06 approved.
Made of advanced composite fiberglass shell, featuring CAD technology for excellent fit, comfort and lightness. The F31 Naby features a long, clear visor (pinlock prepared) and a dark smoke internal sun visor for even greater comfort in bright light. Improved “ACS” Advanced Channeling Ventilation system that allows full front-to-back airflow to flush heat and humidity up and out, with 3 outlets upper air vents and a rear air extractor. The F31 helmet is ready for HJC 11B (BT), 21B (BT) & 50B (Mesh) Bluetooth Smart communication systems.
EAN 8804269465226
Helmet shell
Visor
Ventilation
Interior
Measure the circumference of your head, just above your eyebrows and ears. The circumference in centimeters gives an indication of your helmet size. However, heads come in many forms. Round, oval, long and narrow, you name it. To find a helmet that is safe and comfortable is very important. One helmet in a size medium can have a tight fitting, another can be loose again.
Please note, sizing charts are are always an indication for your size. Your perfect size depends on a lot of aspects. Sizing information below is provided by the manufacturer and does not guarantee a perfect fit.
And if you have doubts or questions, do not hesitate to contact us, we are happy to help you!
Below is an overview of the helmet sizes (in centimeters). If a helmet brand is not specifically mentioned in this list, you can follow the general helmet sizing. Or contact us!
| XXS | XS | S | M | L | XL | XXL | 3XL | ||
|
GENERAL HJC, Shoei, Roeg, Icon, Scorpion, LS2, Shark, Airoh, Alpinestars etc. |
51-52 | 53-54 | 55-56 | - | 57-58 | 59-60 | 61-62 | 63-64 | 65-66 |
| XXS | XS | S | M-SMALL | M-LARGE | L | XL | XXL | 3XL | |
| AGV : a number of helmets come in 2 medium sizes | 51/52 | 53/54 | 55/56 | 57 | 58 | 59/60 | 61/62 | 63/64 | 65/66 |
| XXS |
XS |
S |
MS |
ML |
L |
XL |
XXL |
3XL |
|
| BANDIT | 53-54 |
55-56 |
57 |
58 |
59 |
60 |
62 |
||
| XXS | XS | S | S/M | M | L | XL | XXL | 3XL | |
|
ROOF |
- | 54 | 56 |
57 |
58 |
60 | 61 | 63 | - |
| XXS |
XS |
S |
M |
ML |
L |
XL |
|||
| MOMO | 54 | 55 | 56 | 57 | 58/59 | 60 | 61 | ||
| XXS | XS | S | M | L | XL | XXL | 3XL | ||
|
SCHUBERTH |
50-51 | 52-53 | 54-55 | - | 56-57 | 58-59 | 60-61 | 62-63 | 64-65 |
| XXS | XS | S | M | L | XL | XXL | |||
|
DMD - |
- | 54 | 55 | - | 56/67 | 58 | 59/60 | - | |
|
DMD - |
- | 53/54 | 55/56 | - | 57/58 | 59/60 | 61/62 | 63 |
Additional advantage with the purchase of the HJC F31 Naby
