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.
“Scored 71 of 100 for street riding. It is strongest on price positioning and gives up most on fit range — every point traces back to a documented fact and its source.”
— the Inter-Pace crewApproved to ECE 22.06.
Average for the class.
Comfortable over shorter rides.
Pinlock anti-fog lens is included.
Airflow is adequate.
1,520 g — mid-weight for this class.
Entry bracket in the street field.
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.10074 | Just1 J-STR71 | MT-Helmets Braker SV71 | LS2 FF901 Advant X70 | LS2 FF902 Scope II70 | Nexx Y.100R70 | LS2 FF901 Advant X Carbon69 | Shoei Neotec 369 | Suomy TX-Pro69 | KYT R2R68 | KYT TT-Revo68 | LS2 FF807 Dragon68 | LS2 FF811 Vector II68 | MT-Helmets Genesis R SV68 | Suomy Track-168 | Shoei GT-Air367 | Shoei GT-Air3 SMART67 | LS2 FF811 Vector II Carbon66 | LS2 FF817 Challenger II66 | MT-Helmets Atom 2 SV65 | MT-Helmets Targo S65 | LS2 FF818 Storm III64 | LS2 FF820 Rapid III64 | Nexx X.WST3 Matrix64 | Shark Skwal Cup64 | LS2 FF906 Advant63 | LS2 FF908 Strobe II63 | MT-Helmets Stinger 263 | Nexx X.WST3 Carbon63 | AGV K1 S62 | MT-Helmets KRE 262 | Nexx X.TR Matrix62 | MT-Helmets Streetfighter SV S61 | MT-Helmets Thunder 4 R SV60 | LS2 FF808 Stream II59 | Nexx X.TR Carbon59 | MT-Helmets Stinger 2 Kids58 | Nexx X.LIFETOUR Matrix58 | Nolan N60-6 Sport58 | Nexx X.LIFETOUR Carbon57 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inter-Pace Rating | 83/100 | 74/100 | 71/100 | 71/100 | 70/100 | 70/100 | 70/100 | 69/100 | 69/100 | 69/100 | 68/100 | 68/100 | 68/100 | 68/100 | 68/100 | 68/100 | 67/100 | 67/100 | 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 | 60/100 | 59/100 | 59/100 | 58/100 | 58/100 | 58/100 | 57/100 |
| 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 | Solid |
| Price | 359,20 € | 143,99 € | €143,10 | 114,71 € | 339,15 € | 152,15 € | 175,99 € | 398,65 € | 669,00 € | 397,09 € | 181,55 € | 104,00 € | 407,15 € | 220,15 € | 114,71 € | 256,75 € | 599,00 € | 649,00 € | 322,15 € | 279,65 € | 152,96 € | 118,96 € | 169,15 € | 84,15 € | 367,99 € | 238,50 € | 254,15 € | 118,15 € | 84,96 € | 495,99 € | 223,20 € | 269,96 € | 367,99 € | 114,71 € | 157,21 € | 109,65 € | 503,99 € | 103,46 € | 399,99 € | 215,99 € | 519,99 € |
| Weight | 1,298 kg | 1,575 kg | 1,52 kg | 1,55 kg | 1,6 kg | 1,75 kg | 1,575 kg | 1,55 kg | 1,715 kg | 1,35 kg | 1,5 kg | 1,55 kg | 1,45 kg | 1,5 kg | 1,65 kg | 1,35 kg | 1,7 kg | 1,775 kg | 1,391 kg | 1,5 kg | 1,7 kg | 1,55 kg | 1,55 kg | 1,35 kg | 1,675 kg | 1,57 kg | 1,75 kg | 1,7 kg | 1,6 kg | 1,55 kg | 1,448 kg | 1,38 kg | 1,657 kg | 1,4 kg | 1,5 kg | 1,6 kg | 1,7 kg | 0,0 kg | 1,86 kg | 1,47 kg | 1,75 kg |
| ECE 22.06 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| FIM racing | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Pinlock incl. | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ | — | — | ✓ | — | ✓ | ✓ | — | ✓ | — | ✓ | — | ✓ | ✓ | ✓ |
| Shell | Carbon and aramid fibre | Polyfusion shell | ABS | HIRP high impact resistant polymer | HPFC composite fibre | KPA thermoplastic | Polyfusion shell | Carbon fibre | AIM shell | Tricarboco (carbon, fibreglass, aramid) | Thermoplastic shell | Thermoplastic shell | 6K carbon fibre | Composite fibre | HIRP high impact resistant polymer | Tricarboco (carbon, aramid, fibreglass) | AIM shell | AIM shell | Carbon fibre | fibreglass | Polycarbonate | HIRP high impact resistant polymer | KPA thermoplastic | KPA thermoplastic | X-Matrix composite | Thermoplastic shell with LED lighting | KPA thermoplastic | KPA thermoplastic | HIRP high impact resistant polymer | X-Pro Carbon | Thermoplastic resin | FRC (fibre reinforced composite) | X-Matrix 2 multi-composite | HIRP high impact resistant polymer | HIRP high impact resistant polymer | polycarbonate | X-Pro Carbon | HIRP (High Impact Resistant Polymer) | X-Matrix 2 multi-composite | Lexan polycarbonate | X-Pro Carbon |
| Ventilation | 9/10 | 8/10 | 6/10 | 6/10 | 8/10 | 10/10 | 6/10 | 8/10 | 8/10 | 8/10 | 6/10 | 6/10 | 8/10 | 10/10 | 5/10 | 8/10 | 8/10 | 8/10 | 10/10 | 10/10 | 6/10 | 8/10 | 8/10 | 6/10 | 8/10 | 5/10 | 8/10 | 8/10 | 8/10 | 8/10 | 6/10 | 3/10 | 4/10 | 8/10 | 4/10 | 8/10 | 4/10 | 0/10 | 6/10 | 5/10 | 6/10 |
| Comfort | 6/10 | 9/10 | 8/10 | 9/10 | 9/10 | 8/10 | 9/10 | 9/10 | 10/10 | 9/10 | 6/10 | 9/10 | 9/10 | 9/10 | 9/10 | 9/10 | 8/10 | 8/10 | 9/10 | 8/10 | 9/10 | 9/10 | 9/10 | 9/10 | 6/10 | 5/10 | 6/10 | 6/10 | 8/10 | 6/10 | 5/10 | 7/10 | 9/10 | 8/10 | 8/10 | 6/10 | 9/10 | 10/10 | 9/10 | 6/10 | 9/10 |
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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.
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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.