Just1 J-GPR Racing Helmet Lorenzo Baldassarri Replica – Carbon Shell Full-Face
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Size chart JUST1 J-STR/PGR/PGRF
| 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 tape measure.
It is important that the tape measure runs around the widest part of the head – only then will you get a correct result.
Place the tape measure at the front, about 1–2 cm above the eyebrows, and run it along the sides above the ears.
At the back, the tape must run over the largest part of the back of the head (not too low on the neck). The tape may run slightly at an angle – what matters is that it sits all the way around the largest points of the head.
Make sure the tape measure sits snugly but does not dig in. Measure 2–3 times for the most accurate result. You can then compare the measured value in centimetres (cm) with our size chart.
Tips for an accurate result
- Keep hair flat (e.g. do not measure over a voluminous hairstyle)
- Keep the tape horizontal, i.e. 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 note on fit
The right helmet should fit firmly without causing uncomfortable pressure points.
A new helmet may feel a little tighter at first, as the inner lining adapts slightly over time.
- Worldwide shipping
- Genuine parts & verified quality
- Personal email support
- 14-day returns — in stock ships within 24h
Shipping & Returns
We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.
Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.
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The Just1 J-GPR in the Lorenzo Baldassarri Replica livery is engineered to feel as good over a long alpine tour as it does through the final chicane. Four shell sizes paired with four matching EPP/EPS liner sizes mean the fit wraps your head precisely — no dead space, no pressure points — so fatigue stays off the agenda from the first kilometre to the last.
Key Features
- Four shell sizes with four corresponding EPP/EPS liner sizes deliver a tailored, individual fit across every head shape
- S.D.C. (Sequential Density Construction) system combines materials of varying densities to absorb both linear and rotational impact forces
- 3K carbon fibre shell keeps the helmet light without sacrificing structural rigidity
- J.1.E.R. emergency cheek-pad removal system allows first responders to extract the helmet safely
- PROTX2 antimicrobial technology built into the liner fabric fights odour and bacteria on extended ride days
- Eleven-vent system — five intake, six exhaust — plus an integrated, vented spine protector keep air moving continuously
- Removable, washable interior liner and a new lining-retention net maintain freshness and shape over thousands of kilometres
Construction & Comfort
Just1 built the J-GPR around a genuine 3K carbon fibre shell, produced in four discrete sizes so the shell curvature is never compromised by stretching one mould across the full size range. The result is consistent wall thickness and predictable impact behaviour whether you order an XS or an XXL. Inside, the S.D.C. liner architecture layers EPS foam of different densities: softer outer zones manage the initial rotational energy of an oblique strike, while a denser core limits peak linear deceleration. The EPS-lined chin guard extends this protection to the lower face.
Day-to-day livability is handled by the PROTX2 antimicrobial fabric, which suppresses the bacteria responsible for helmet odour — a genuine benefit for riders who log big daily mileage. The entire interior, cheek pads included, unzips and machine-washes, and the new lining-retention net keeps everything seated correctly when you reassemble. A Camel-Bag hydration port is already integrated, so long-distance riders can stay hydrated without stopping.
Ventilation & Visor System
Five intake vents and six exhaust outlets work together with the internally vented spine channel to pull warm air across the scalp and out at the rear. The anti-fog visor and included Pinlock insert eliminate misting in cold or damp conditions, while the included dark visor gives you an immediately usable sun solution without reaching for a separate shield. The double-D retention ring is the standard trusted by racing homologators worldwide.
Lorenzo Baldassarri Replica
This gloss-finish graphic is a direct replica of the livery worn by Lorenzo Baldassarri during competition. The artwork is applied under a high-gloss clear coat that resists UV fade and road grime, keeping the replica detail sharp season after season.
Fitment & Compatibility
The J-GPR is a full-face motorcycle helmet suitable for road and track use. Measure the widest circumference of your head approximately 1 cm above the ear and match to the size guide below:
- XS — 53–54 cm
- S — 55–56 cm
- M — 57–58 cm
- L — 59–60 cm
- XL — 61–62 cm
- XXL — 63 cm
Specifications
| Attribute | Detail |
|---|---|
| Part number | 6030160112008 |
| Shell material | 3K carbon fibre |
| Certification | UNECE 22-06 |
| Weight | 1,550 g +/- 50 g (size M) |
| Colour / finish | Lorenzo Baldassarri Replica, gloss |
| Retention system | Double-D ring |
| Anti-fog visor included | Yes |
| Removable interior | Yes |
| Camel-Bag ready | Yes |
| Brand | Just1 |
|---|---|
| Model | J-GPR |
| Part number | 6030160112008 |
| Shell material | 3K carbon fibre |
| Certification | UNECE 22-06 |
| Weight | 1,550 g +/- 50 g (size M) |
| Colour / finish | Lorenzo Baldassarri Replica, gloss |
| Retention system | Double-D ring |
| Removable / washable interior | Yes |
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1x Just1 J-GPR helmet
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1x clear visor
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1x Pinlock insert
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1x dark visor
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1x nose cover
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1x premium helmet bag
Fitment data coming soon.
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// Just1
Just1 J-GPR Racing Helmet Lorenzo Baldassarri Replica – Carbon Shell Full-Face

Tech specs
- Brand
- Just1
- Model
- J-GPR
- Part number
- 6030160112008
- Shell material
- 3K carbon fibre
- Certification
- UNECE 22-06
- Weight
- 1,550 g +/- 50 g (size M)
- Colour / finish
- Lorenzo Baldassarri Replica, gloss
- Retention system
- Double-D ring
- Removable / washable interior
- Yes
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
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