The facts.
| Brand | Just1 |
|---|---|
| Model | J-STR |
| Part Number | 6030390181000 |
| Type | Full-face helmet |
| Outer Shell | ABS, 2 shell sizes |
| Inner Shell | EPS, 2 sizes |
| Certifications | ECE 22.06, DOT, CCC |
| Retention System | Double-D ring |
| Colour | Solid gloss white |
DescriptionThe whole story▼
Built around an ABS shell engineered in two size-optimised geometries and lined with Protx2™ antibacterial fabric, the Just1 J-STR Solid Gloss White is a full-face helmet that takes construction quality seriously from the shell outward. The high-gloss white finish maximises on-road visibility while projecting a clean, timeless look that ages far better than graphic alternatives.
Key Features
- ABS outer shell produced in two shell sizes for a more precise fit at every head circumference
- EPS inner shell also manufactured in two sizes, matching impact absorption geometry to each shell
- Triple certification: ECE 22.06, DOT, and CCC — covering road use across Europe, North America and beyond
- J.I.E.R. Emergency Cheek Pads Removal System for rapid cheek-pad extraction by first responders
- Double-D retention system — the benchmark fastening method for secure, rattle-free closure
- Protx2™ interior lining: antibacterial, odour-inhibiting and fast-drying, fully removable and machine washable
- Scratch-resistant visor with a wide field of view, prepared for optional accessory visors
Shell Construction and Safety Architecture
The J-STR's ABS outer shell is not a single-size moulding stretched across the size range. Just1 produces it in two distinct geometries so that a size XS shell is proportionally correct for a 53–54 cm head rather than merely a scaled-down version of a larger mould. The EPS liner follows the same logic with its own two-size architecture, meaning the energy-absorbing foam sits at the right thickness and density regardless of which size you select. The result is consistent impact protection across the full XS-to-XXL range — a detail that matters and one that separates thoughtfully engineered helmets from budget alternatives.
Everyday Comfort and Hygiene
The Protx2™ interior treatment addresses one of the most persistent practical problems with regular helmet use: hygiene. The antibacterial and odour-inhibiting properties keep the lining fresher for longer between washes, while the fast-drying construction means the helmet is ready to ride again quickly after cleaning. All interior pads detach fully for machine washing, and the fit is designed to be snug and stable without creating pressure points on longer commutes or touring days. Ventilation channels promote air circulation to keep the interior temperature manageable across seasons.
Equipment and Practical Details
The J-STR comes with a nose cover included and ships in a helmet bag to protect the gloss finish during storage and transport. The scratch-resistant visor offers a wide field of view and is prepared for compatible accessory visors from the Just1 range, giving you the option to add a tinted or photochromic lens without replacing the helmet. The gloss white colourway is one of the most visible finishes available on road, an advantage that counts in low-light urban environments and on open roads alike.
Fitment and Compatibility
The Just1 J-STR is an adult full-face helmet available in sizes XS through XXL. Use the sizing table below and the fitting guide to select correctly — a helmet that rotates on the head is too large and must be exchanged for the next size down.
| Size | Head circumference (cm) | Head circumference (in) |
|---|---|---|
| XS | 53–54 | 20.9–21.3 |
| S | 55–56 | 21.7–22.1 |
| M | 57–58 | 22.4–22.8 |
| L | 59–60 | 23.2–23.6 |
| XL | 61–62 | 24.0–24.4 |
| XXL | 63 | 24.8–25.2 |
How to Measure Your Head
Place a flexible tape measure approximately 1.5 cm above the eyebrows and around the widest point of the skull. Take the measurement two or three times to confirm accuracy. The helmet should feel firmly seated and even — snug but not painful. If the helmet can be rotated from side to side once fastened, select the next size down.
Specifications
- Brand: Just1
- Model: J-STR
- Part number: 6030390181000
- Type: Full-face helmet
- Outer shell material: ABS (2 shell sizes)
- Inner shell: EPS (2 sizes)
- Certifications: ECE 22.06, DOT, CCC
- Interior lining: Protx2™ antibacterial, removable and washable
- Retention system: Double-D ring
- Emergency system: J.I.E.R. Emergency Cheek Pads Removal System
- Visor: Scratch-resistant, wide field of view, accessory-visor ready
- Colour: Solid gloss white
- Sizes available: XS, S, M, L, XL, XXL
- Included: Helmet, nose cover, helmet bag
What's includedEverything in the box▼
- Just1 J-STR Solid Gloss White helmet
- Nose cover
- Helmet bag
FitmentBy head size — not by bike▼
Rated. Certified. Lit.
“Two shell sizes and two EPS sizes at 1,520 g, with a double-D ring, emergency cheek-pad release and a fully vented chin bar — a proper specification for the money. Be aware of what is behind the score: nobody has measured this helmet independently, so those areas are left out of the total rather than guessed.”
— the Inter-Pace crewECE 22.06.
ABS shell in two sizes, two EPS sizes, emergency cheek-pad release.
Not measured by anyone.
Protx2 antimicrobial lining, removable and washable.
Wide-vision visor, Pinlock prepared.
The chin bar is EPS-lined and fully vented.
1,520 g claimed.
One of the cheapest ECE 22.06 full-face helmets we sell.
143 € — Entry. Hover the bar for each range. Value is scored against the street field, not in the abstract.
J-STR vs —
Compare the grid.
| AGV K6 S83 | Nexx Y.10076 | Just1 J-STR72 | MT-Helmets Braker SV72 | Nexx Y.100R71 | LS2 FF901 Advant X70 | LS2 FF902 Scope II70 | LS2 FF901 Advant X Carbon69 | Shoei Neotec 369 | Suomy TX-Pro69 | KYT R2R68 | LS2 FF807 Dragon68 | LS2 FF811 Vector II68 | LS2 FF817 Challenger II68 | MT-Helmets Genesis R SV68 | Shoei GT-Air367 | Shoei GT-Air3 SMART67 | KYT TT-Revo66 | LS2 FF811 Vector II Carbon66 | Suomy Track-166 | MT-Helmets Atom 2 SV65 | MT-Helmets Targo S65 | LS2 FF818 Storm III64 | LS2 FF820 Rapid III64 | LS2 FF906 Advant64 | LS2 FF908 Strobe II64 | MT-Helmets KRE 263 | MT-Helmets Stinger 263 | MT-Helmets Streetfighter SV S63 | Nexx X.WST3 Matrix63 | AGV K1 S62 | Nexx X.TR Matrix62 | Nexx X.WST3 Carbon62 | LS2 FF808 Stream II61 | Nexx X.TR Carbon59 | MT-Helmets Thunder 4 R SV58 | Nexx X.LIFETOUR Matrix58 | Nolan N60-6 Sport58 | Nexx X.LIFETOUR Carbon57 | Shark Skwal53 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inter-Pace Rating | 83/100 | 76/100 | 72/100 | 72/100 | 71/100 | 70/100 | 70/100 | 69/100 | 69/100 | 69/100 | 68/100 | 68/100 | 68/100 | 68/100 | 68/100 | 67/100 | 67/100 | 66/100 | 66/100 | 66/100 | 65/100 | 65/100 | 64/100 | 64/100 | 64/100 | 64/100 | 63/100 | 63/100 | 63/100 | 63/100 | 62/100 | 62/100 | 62/100 | 61/100 | 59/100 | 58/100 | 58/100 | 58/100 | 57/100 | 53/100 |
| Level | Recommended | Recommended | Recommended | Recommended | Recommended | Recommended | Recommended | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid | Solid |
| Price | 359,20 € | 143,99 € | ¥22,200 | 114,71 € | 175,99 € | 339,15 € | 152,15 € | 398,65 € | 669,00 € | 397,09 € | 181,55 € | 407,15 € | 220,15 € | 279,65 € | 114,71 € | 599,00 € | 649,00 € | 120,20 € | 322,15 € | 286,01 € | 152,96 € | 118,96 € | 169,15 € | 84,15 € | 254,15 € | 118,15 € | 269,96 € | 84,96 € | 114,71 € | 367,99 € | 223,20 € | 367,99 € | 495,99 € | 109,65 € | 503,99 € | 157,21 € | 399,99 € | 215,99 € | 519,99 € | 238,50 € |
| Weight | 1,298 kg | 1,575 kg | 1,52 kg | 1,55 kg | 1,575 kg | 1,6 kg | 1,75 kg | 1,55 kg | 1,715 kg | 1,35 kg | 1,5 kg | 1,45 kg | 1,5 kg | 1,5 kg | 1,65 kg | 1,7 kg | 1,775 kg | 1,55 kg | 1,391 kg | 1,35 kg | 1,7 kg | 1,55 kg | 1,55 kg | 1,35 kg | 1,75 kg | 1,7 kg | 1,38 kg | 1,6 kg | 1,4 kg | 1,675 kg | 1,448 kg | 1,657 kg | 1,55 kg | 1,6 kg | 1,7 kg | 1,5 kg | 1,86 kg | 1,47 kg | 1,75 kg | 1,57 kg |
| ECE 22.06 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| FIM racing | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Pinlock incl. | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | ✓ | — | ✓ | — | — | ✓ | — | ✓ | ✓ | — | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Shell | Carbon and aramid fibre | Polyfusion shell | ABS | HIRP high impact resistant polymer | Polyfusion shell | HPFC composite fibre | KPA thermoplastic | Carbon fibre | AIM shell | Tricarboco (carbon, fibreglass, aramid) | Thermoplastic shell | 6K carbon fibre | Composite fibre | fibreglass | HIRP high impact resistant polymer | AIM shell | AIM shell | Thermoplastic shell | Carbon fibre | Tricarboco (carbon, aramid, fibreglass) | Polycarbonate | HIRP high impact resistant polymer | KPA thermoplastic | KPA thermoplastic | KPA thermoplastic | KPA thermoplastic | FRC (fibre reinforced composite) | HIRP high impact resistant polymer | HIRP high impact resistant polymer | X-Matrix composite | Thermoplastic resin | X-Matrix 2 multi-composite | X-Pro Carbon | polycarbonate | X-Pro Carbon | HIRP high impact resistant polymer | X-Matrix 2 multi-composite | Lexan polycarbonate | X-Pro Carbon | Thermoplastic shell with LED lighting |
| Ventilation | 9/10 | 8/10 | 6/10 | 8/10 | 8/10 | 8/10 | 10/10 | 8/10 | 8/10 | 8/10 | 6/10 | 8/10 | 10/10 | 10/10 | 5/10 | 8/10 | 8/10 | 6/10 | 10/10 | 8/10 | 6/10 | 8/10 | 8/10 | 6/10 | 8/10 | 8/10 | 3/10 | 8/10 | 8/10 | 8/10 | 6/10 | 4/10 | 8/10 | 8/10 | 4/10 | 4/10 | 6/10 | 5/10 | 6/10 | 5/10 |
| Comfort | 6/10 | 9/10 | 8/10 | 9/10 | 9/10 | 9/10 | 8/10 | 9/10 | 10/10 | 9/10 | 6/10 | 9/10 | 9/10 | 8/10 | 9/10 | 8/10 | 8/10 | 9/10 | 9/10 | 9/10 | 9/10 | 9/10 | 9/10 | 9/10 | 6/10 | 6/10 | 7/10 | 8/10 | 8/10 | 6/10 | 5/10 | 9/10 | 6/10 | 6/10 | 9/10 | 5/10 | 9/10 | 6/10 | 9/10 | 5/10 |
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The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
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Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.