Just1 J-GPRF racing helmet in solid gloss white, front three-quarter view 360° — drag me
1,600 g
02 · Data & docs

The facts.

Technical data
BrandJust1
ModelJ-GPRF
Part number6130320181000
ApprovalUNECE 22-06
Shell materialMulticomposite Fibre
Weight1,600 g +/- 50 g (size M)
ColourWhite
FinishGloss
Retention systemDouble-D ring
Anti-fog visorYes (Pinlock included)
DescriptionThe whole story

The Just1 J-GPRF is the brand's most advanced road and racing helmet, built around the patented S.D.C. System (Sequential Density Construction) to deliver certified protection against both linear and rotational impact forces. Offered here in a clean gloss white finish, it holds full UNECE 22-06 approval — the most stringent homologation standard in modern motorcycling — and is ready to perform from the morning commute to the race circuit.

Key Features

  • UNECE 22-06 certified: meets the highest current impact safety standard for road and competition use
  • S.D.C. System (Sequential Density Construction): multi-density materials absorb energy across the full impact spectrum, addressing both linear and rotational forces
  • Multicomposite Fibre shell: available in four shell sizes and four EPP/EPS liner sizes for a precision, size-specific fit rather than a one-shell compromise
  • J.1.E.R. emergency cheek-pad removal system: allows first responders to remove the helmet safely without aggravating a neck injury
  • PROTX2 antimicrobial lining technology: inhibits bacteria and odour, keeping the interior fresher for longer
  • 11-vent ventilation circuit: five intake and six exhaust ports channel airflow across the skull and out through the integrated ventilated spine protector
  • Anti-fog Pinlock visor included: clear and dark visors supplied as standard, with a Pinlock insert for mist-free vision in cold or wet conditions

Construction and Comfort

The J-GPRF shell is fabricated from a Multicomposite Fibre layup, delivering a stiff, lightweight structure that distributes impact loads efficiently into the multi-density EPP/EPS liner beneath. Four discrete shell sizes ensure that every head circumference is housed in a shell shaped for it — not stretched or padded to fit — which has a direct bearing on both comfort and crash performance.

Inside, the fully removable and washable liner uses PROTX2 antimicrobial technology to resist bacteria build-up during hard sessions. The new liner retention net keeps the interior neat and prevents any movement of the comfort padding during use. The double-D ring retention system provides a secure, proven closure that meets race-day requirements, while the EPS-lined chin bar adds an additional layer of protection at a vulnerable point of impact.

The helmet is also prepared for hydration system compatibility, with an integrated Camel-Bag routing so long-distance or endurance riders can drink on the move without modification.

Ventilation

A five-inlet, six-outlet ventilation architecture moves air from the chin bar and forehead intakes across the skull, exhausting heat and humidity through the rear. The integrated ventilated spine protector continues this airflow management down the back of the shell, reducing heat build-up on track or in summer traffic.

Fitment and Sizing

To find your correct size, wrap a flexible tape measure approximately 1 cm above the ear at the widest point of the skull and consult the size chart below. The J-GPRF is not a one-size-fits-all shell: the four shell and four liner size combinations mean the physical dimensions change between sizes for a truer anatomical fit.

  • 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
Brand Just1
Model J-GPRF
Part number 6130320181000
Approval UNECE 22-06
Shell material Multicomposite Fibre
Weight 1,600 g +/- 50 g (size M)
Colour White
Finish Gloss
Retention system Double-D ring
Anti-fog visor Yes (Pinlock included)
Removable lining Yes, fully removable and washable
Ventilation 5 intake / 6 exhaust ports
Hydration compatible Yes (Camel-Bag routing)

What's in the Box

  • 1x Just1 J-PGRF helmet
  • 1x clear visor
  • 1x Pinlock insert
  • 1x dark visor
  • 1x nose cover
  • 1x premium helmet bag
What's includedEverything in the box
  • 1x Just1 J-PGRF helmet
  • 1x clear visor
  • 1x Pinlock insert
  • 1x dark visor
  • 1x nose cover
  • 1x premium helmet bag
FitmentBy head size — not by bike
04 · The Inter-Pace Rating

Rated. Certified. Lit.

All 85 points of the sport matrix were assessable
iP72/100RECOMMENDED Drag to spin
The Inter-Pace Rating
0/100
0507085100
RecommendedCarbon, four shells, heavy
P23 on our sport grid · 27 rivals in scrutineering · rated 2026-09-02
Entry 0–49 · Solid 50–69 · Recommended 70–84 · Benchmark 85–100
ECE 22.06 · EQRS · MIPS · DOUBLE-D · 11 VENTS · 1,600 G · PINLOCK · 3K CARBON FIBRE · ECE 22.06 · EQRS · MIPS · DOUBLE-D · 11 VENTS · 1,600 G · PINLOCK · 3K CARBON FIBRE ·

“A full carbon shell in four sizes with a titanium double-D and eleven vents, for 287 €. The weight is what stands out the wrong way: 1,600 g is heavy for carbon, and it costs the helmet real points here.”

— the Inter-Pace crew
Homologation6/12
ECE 22.06 street homologation6/6
FIM FRHPhe racing homologation0/6

ECE 22.06 and DOT.

Safety equipment10/10
Multi-density EPS liner2/2
EQRS emergency release system2/2
double-d closure2/2
4 shell sizes2/2
Rotational-impact system (MIPS or equivalent)2/2

3K carbon shell in four sizes with a rotational system.

Aero & stability3/10
Aerodynamic spoiler / stabiliser — not listed0/2
Wind-tunnel developed — not listed0/2
Stability at speed in reviews3/6

Ventilation8/9
11 vent ports3/3
Vents operable with gloves on2/2
Airflow in independent reviews3/4

Five intakes and six exhausts — generous.

Vision & visor6/8
Pinlock anti-fog lens included3/3
Tear-off posts — not listed0/1
Photochromic visor available — not listed0/1
wide eyeport3/3

Pinlock prepared, wide port.

Wind noise4/7
Wind noise at motorway speed4/7

Interior comfort7/8
Fully removable lining2/2
Washable lining1/1
Comfort in independent reviews4/5

Removable, washable, antimicrobial treatment.

Weight2/5
1,600 g measured2/5

1,600 g — heavy for a carbon shell.

Fit range4/4
6 sizes2/2
4 shell sizes across the range2/2

Four shell sizes across the range.

Price positioning10/10
Delivered quality against its price in this class10/10
287 € — Mid-range

Carbon and four shell sizes for 287 €.

Certification
ECE 22.06 street homologation
Price-class
Entry€301,76BasicMid-rangePremiumHigh classHigh-endFlagship

287 € — Basic. Hover the bar for each range. Value is scored against the sport field, not in the abstract.

Safety & tests
SHARP impact ratingawaiting · not counted
CERTIMOOV protocolawaiting · not counted
Crew scrutineering
How this rating is made: crew scrutineering, cross-checked against Just1 official J-GPR F product page XtremeHelmets J-GPR Antham Racing J-GPR Carbon FIM official FRHPhe-02 homologation announcement Cycle News list of FIM-homologated helmets Tests count only when a result exists — never a penalty
The race-helmet gridmint = this helmet
90/100 P1 Shoei X-SPR PRO FIMBenchmark · gap —
89/100 P2 Shoei X-SPR PRO FIM 2Benchmark · gap −1
84/100 P3 Shark Aeron GP FIM 2Recommended · gap −6
82/100 P4 Arai RX-7V FIMRecommended · gap −8
82/100 P5 Arai RX-7V FIM 2Recommended · gap −8
82/100 P6 Shark Aeron GP FIMRecommended · gap −8
81/100 P7 AGV K6 SRecommended · gap −9
79/100 P8 Just1 J-GPRRecommended · gap −11
78/100 P9 Nexx X.R3R Pro FIM EvoRecommended · gap −12
78/100 P10 NHK Helmet GP-R TechRecommended · gap −12
78/100 P11 Nolan X-804 RS UltraRecommended · gap −12
77/100 P12 Airoh GP 800 FIMRecommended · gap −13
77/100 P13 Alpinestars Supertech R10Recommended · gap −13
77/100 P14 MT-Helmets KRE 2 PLUS FIM Racing #2Recommended · gap −13
76/100 P15 LS2 FF805 Thunder FIMRecommended · gap −14
72/100 P23 Just1 J-GPRFRecommended · gap −18You’re viewing
Radar · head to head

J-GPRF vs

J-GPRF · 72 · 0
Full comparison — Matrix · Radar · Duel — lives on slide 05.
05 · Compare

Compare the grid.

J-GPRF72/100Recommended
VS
0/100
Pick your challenger — every bar re-fights instantly
How these ratings are made: Inter-Pace crew scrutineering, cross-checked against Just1 official J-GPR F product page XtremeHelmets J-GPR Antham Racing J-GPR Carbon FIM official FRHPhe-02 homologation announcement Cycle News list of FIM-homologated helmets SHARP / CERTIMOOV count only when results exist.
06 · Complete the look

Head to toe.

Auto-matched to this helmet's sector — Racing
Head to toeAuto-filled from the Racing sector
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07 · Support

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Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.

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