Just1 J-STR Helmet Astro Red / Blue / Black Gloss 6030390112007
Just1 J-STR Helmet Astro Red / Blue / Black Gloss 6030390112007
Delivery time on request
| Size | Head Circumference (cm) | Head Circumference (inch) |
|---|---|---|
| XS | 53–54 cm | 20.9–21.3 in |
| S | 55–56 cm | 21.7–22.0 in |
| M | 57–58 cm | 22.4–22.8 in |
| L | 59–60 cm | 23.2–23.6 in |
| XL | 61–62 cm | 24.0–24.4 in |
| XXL | 63–64 cm | 24.8–25.2 in |
How to Measure Your Helmet Size Correctly: To find the right helmet size, measure your head circumference with a flexible measuring tape.
It is important that the measuring tape runs at the widest part of your head – only then will you get an accurate result.
Place the measuring tape about 1–2 cm above your eyebrows at the front and run it along the sides above your ears.
At the back, the measuring tape should run over the largest point at the back of your head (not too low on the neck). The tape can run slightly diagonally – what matters is that it fits snugly around the largest circumference points of your head.
Make sure that the measuring tape is tight but does not cut in. It is best to measure 2–3 times to get the most accurate result possible. You can then compare the measured value in centimeters (cm) with our size chart.
Tips for an Accurate Result
- Flatten hair (e.g., do not measure with a voluminous hairstyle)
- Run the measuring tape horizontally or along the largest circumference
- Do not measure too loosely
- For values between two sizes:
→ usually choose the larger size (depending on helmet model/fit)
Important for fit
The right helmet should fit snugly without causing uncomfortable pressure points.
A new helmet may feel a bit tighter at first, as the inner padding will slightly adjust over time.
JUST1 J-STR Helmet – Astro Red / Blue / Black Gloss
Dynamic graphic design meets modern safety
With the JUST1 J-STR Astro, you get a strikingly designed full-face helmet that combines sportiness, comfort, and high-quality safety standards. The glossy Red/Blue/Black graphic makes it a real eye-catcher – perfect for sporty street and naked bike riders.
The helmet impresses both in everyday use and on longer tours with its lightweight feel and reliable construction according to ECE 22.06.
🛡 SAFETY – developed according to the latest standards
The Astro utilizes the advanced safety platform of the J-STR series:
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ABS outer shell in 2 shell sizes
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EPS inner shell in 2 sizes
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ECE 22.06 certified
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DOT certified
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J.I.E.R. Emergency Cheek Pads Removal System
→ quick & safe helmet removal in case of emergency -
robust double-D closure
An ideal helmet for sporty riders who do not want to compromise on the latest standards.
😌 COMFORT – breathable interior
An advanced inner lining ensures a pleasant helmet climate:
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Protx2™ antimicrobial treatment
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removable & washable
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comfortable cheek pads for a stable fit
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efficient ventilation for optimal air circulation
Even on longer distances, the J-STR remains pleasantly fresh and stable.
👁 VISOR – wide view & anti-fog prepared
Thanks to its modern visor design, you enjoy a very wide field of vision:
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Wide Vision Visor
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scratch-resistant & clear
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Pinlock 70 prepared (Pinlock insert optional)
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including Nose Cover
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practical helmet bag
Excellent visibility – whether in city traffic, on country roads, or during sporty riding.
🎁 SCOPE OF DELIVERY
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JUST1 J-STR Astro Red/Blue/Black
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Nose Cover
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Helmet Bag
📏 Adult Size Chart
| Size | Head Circumference (cm) | Inch |
|---|---|---|
| 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 |
🧭 This is how to measure the correct helmet size
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Place the measuring tape just above the eyebrows
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Measure the circumference at the widest point of the head
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Measure multiple times for accurate values
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The helmet should fit snugly but not uncomfortably
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If the helmet moves while wearing it → choose one size smaller
🚀 CONCLUSION
The JUST1 J-STR Astro is a sporty, stylish full-face helmet focused on safety, comfort, and strong aesthetics. Ideal for riders who want to combine modern, vibrant design with proven technology.
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About Us
About Us
Our passion for quality and innovation drives us to offer you the best products and services for motorcycle enthusiasts. From exclusive high-performance parts to tailor-made solutions — your riding experience is at the center of everything we do.
Shipping & Returns
Shipping & Returns
We ship with DHL and FedEx — if requested, also via express. If an item is in stock, shipping via express can, in many cases, be delivered within 1 business day. Standard delivery time is typically about 2–5 business days within the country, and worldwide usually about 1 week. Please check the available shipping options and transit times in the cart, as we offer several shipping providers depending on the country.
Returns must be registered in advance by email and are possible according to our return policy (14 days to request a return + 14 days return shipping deadline after approval). Please note: Unregistered returns will not be accepted. You can find all details on the terms, exceptions, and refunds in our return policy.
Your payment information is processed securely. We do not store any credit card details and we have no access to your credit card information.
More information in our FAQs
Write to our team via email – we’ll get back to you as quickly as possible.
How long does it take to process my order?
How long does it take to process my order?
If the item is in stock, we usually process your order very quickly; in many cases it can even be shipped the same day.
Our processing times are Monday to Friday, 07:30–16:30.
Do you ship internationally?
Do you ship internationally?
Yes, we ship worldwide. Shipping is carried out depending on the country and the selection, via DHL or FedEx.
What is your return policy?
What is your return policy?
Returns must be registered in advance by email. You can request a return within 14 days of receiving the item and, after approval, you have another 14 days to send it back.
Important: Unregistered returns are not accepted. All details can be found in our cancellation policy.
What does “delivery time on request” mean?
What does “delivery time on request” mean?
“Delivery time on request” means the item is generally not in stock right away and may need to be ordered separately. Please contact us before purchase – we’ll check availability and tell you the estimated delivery time.
Do you offer express shipping?
Do you offer express shipping?
Yes, we offer express shipping. If an item is in stock, in many cases shipping can be completed within 1 business day (depending on the country and shipping option). You can see the available shipping methods in the shopping cart.
