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HJC R-PHA 91 Flip-Up Helmet - SF Metallic Blue
(Product No.: BB-107H450.06-L)
HJC R-PHA 91 Flip-Up Helmet - SF Metallic Blue
The R-PHA 91 is HJC's new flip-up touring helmet designed for all-day comfort. The new Premium Integrated Matrix EVO shell (P.I.M. EVO) offers improved impact resistance and is particularly light thanks to the use of reinforcement materials such as carbon aramid, carbon fibre, glass fibre, organic fleece and linen fiber (natural fibre). The new HJ-37 anti-distortion visor and HJ-V17 sun visor provide the driver with clear and improved peripheral vision. The chinbar locking system has been perfected and now features a hidden locking point that allows for gentle contact and less pressure on the cheek area. Noise is kept to a minimum with the 3D machined R-PHA 91 low noise interior, which is designed to significantly reduce road noise. This also includes the neck padding system, which ensures that noise development is suppressed. The EPS construction is suitable for riders with glasses. The R-PHA 91 is also compatible with the second generation Smart HJC Bluetooth systems.Find more products here
HJC Size Chart
HJC offers motorcycle helmets and bicycle helmets with partly different size ranges. The categories are therefore listed separately. Individual models may differ from the general reference chart; product-specific sizing always takes priority.
Motorcycle helmets – general HJC reference chart
Measure the head circumference with a flexible measuring tape around the head. For motorcycle helmets, HJC recommends measuring approximately 2.5 cm above the eyebrows.
| Size | Head circumference (cm) | Hat size | Head circumference (inches) |
|---|---|---|---|
| 3XS* | 50–51 | 6 1/4 – 6 3/8 | 19 3/4 – 20 1/8 |
| 2XS | 52–53 | 6 1/2 – 6 5/8 | 20 1/2 – 20 7/8 |
| XS | 54–55 | 6 3/4 – 6 7/8 | 21 1/4 – 21 5/8 |
| S | 55–56 | 6 7/8 – 7 | 21 5/8 – 22 |
| M | 57–58 | 7 1/8 – 7 1/4 | 22 3/8 – 22 7/8 |
| L | 58–59 | 7 1/4 – 7 3/8 | 22 7/8 – 23 1/4 |
| XL | 60–61 | 7 1/2 – 7 5/8 | 23 5/8 – 24 |
| 2XL | 62–63 | 7 3/4 – 7 7/8 | 24 3/8 – 24 3/4 |
| 3XL | 64–65 | 8 – 8 1/8 | 25 1/8 – 25 1/2 |
| 4XL | 66–67 | 8 1/4 – 8 3/8 | 26 – 26 3/8 |
| 5XL | 68–69 | 8 1/2 – 8 5/8 | 26 3/4 – 27 1/8 |
* According to HJC, 3XS is available for the C10 as a youth size.
HJC Y10 – youth sizes
| Size | Head circumference (cm) |
|---|---|
| YS | 48–49 |
| YM | 50–51 |
| YL | 52–53 |
Bicycle helmets – model-specific sizing
HJC Sports size ranges vary between certain model generations, especially for size L. The official model-specific measurements are therefore listed separately.
| Model | S – head circumference (cm) | M – head circumference (cm) | L – head circumference (cm) |
|---|---|---|---|
| Atara | 51–56 | 55–59 | 58–61 |
| Bellus | 51–56 | 55–59 | 58–61 |
| Bellus 2 | 51–56 | 55–59 | 58–63 |
| Calido | 51–56 | 55–59 | 58–63 |
| Coban | 51–56 | 55–59 | 58–63 |
| Crosser | 51–56 | 55–59 | 58–63 |
| Furion 2.0 | 51–56 | 55–59 | 58–61 |
| Furion 3 | 51–56 | 55–59 | 58–63 |
| Gleo (Kinder / Kids) | 49–55 | – | – |
| Ibex 2.0 | 51–56 | 55–59 | 58–61 |
| Ibex 3 | 51–56 | 55–59 | 58–63 |
| Route | 51–56 | 55–59 | 58–63 |
| Valeco | 51–56 | 55–59 | 58–63 |
| Valeco 2 | 51–56 | 55–59 | 58–61 |
Safety note: A size chart is a reference only. A helmet must fit firmly and evenly around the head, must not move out of position and should not create problematic pressure points. HJC warns that wearing the wrong helmet size can increase the risk of injury. Always try the helmet on and follow the product-specific fitting and safety instructions.
Updated: 11 August 2026. Basis: official HJC Europe motorcycle helmet size chart and proper-fit guidance, plus official HJC Sports product pages for the bicycle helmet models listed above.