Just1 J-GPRF full-face racing helmet in solid matte black
ECE
360° — drag me
1,600 g5 Vents
02 · Data & docs

The facts.

Technical data
BrandJust1
ModelJ-GPRF
Part Number6130320201000
Shell MaterialMulticomposit Fiber
CertificationUNECE 22-06
Weight1,600 g +/- 50 g (size M)
Colour / FinishSolid black, matte
Closure SystemDouble-D ring
Ventilation5 intake ports, 6 exhaust vents
DescriptionThe whole story

The Just1 J-GPRF in solid matte black is a full-face racing helmet that wears its intent on its surface — a clean, understated finish that lets engineering speak louder than graphics. Developed specifically for both road riding and competitive motorsport, the J-GPRF represents Just1's most advanced helmet to date, built around the proprietary S.D.C. (Sequential Density Construction) system for superior impact management.

Key Features

  • S.D.C. (Sequential Density Construction) — multi-density materials absorb both linear and rotational impact forces, directing energy away from the rider's head
  • Multicomposit Fiber shell available across 4 shell sizes, paired with 4 EPP/EPS liner sizes, for a precise and personalised fit at every head circumference
  • J.1.E.R. emergency cheek-pad removal system for first-responder access without compromising the rider
  • PROTX2 antimicrobial technology throughout the interior lining, keeping the helmet fresh on long riding days
  • 11-port ventilation system with 5 intakes and 6 exhaust vents, plus an integrated, vented chin guard with EPS lining
  • Pinlock-ready anti-fog visor included as standard, alongside a tinted visor for variable light conditions
  • Hydration system compatible — internal camel bag preparation built in

Craftsmanship and Finish

The matte black finish on the J-GPRF is not an afterthought — it is a deliberate design statement rooted in Just1's racing heritage. Where gloss finishes demand attention, the solid matte surface projects quiet confidence and translates directly to the track aesthetic that serious riders expect. The Multicomposit Fiber construction keeps the shell light without sacrificing structural integrity, and the four discrete shell sizes ensure the geometry remains correct regardless of the size you choose.

Inside, the fully removable and washable liner uses a retention net system to maintain its position under hard riding, while the double-D ring closure delivers the secure, competition-proven fastening that racing helmets require. The liner's PROTX2 antimicrobial treatment actively resists bacteria and odour over time — a meaningful advantage for riders who log serious mileage.

Road and Track Performance

The J-GPRF is certified to UNECE 22-06, the current European standard for motorcycle helmets, making it legal for road use across Europe while meeting the demands of track-day and racing environments. The ventilation architecture — five dedicated intake ports channelling air through the shell, six exhaust vents drawing it out — is designed to maintain airflow at pace, reducing fogging and heat build-up during sustained high-speed riding. The integrated, EPS-lined chin guard adds a further layer of protection at an area frequently compromised in lesser helmets.

Fitment and Sizing

To determine your correct size, wrap a soft tape measure approximately 1 cm above the ear, around the widest point of your head. Match the resulting measurement 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

  • Part number: 6130320201000
  • Shell material: Multicomposit Fiber
  • Certification: UNECE 22-06
  • Weight: 1,600 g +/- 50 g (size M)
  • Colour: solid black, matte finish
  • Closure: double-D ring
  • Anti-fog visor: yes (included)
  • Removable liner: yes
  • Hydration compatible: yes (camel bag preparation)
  • Ventilation: 5 intake / 6 exhaust ports
What's includedEverything in the box
  • 1x Just1 J-GPRF helmet
  • 1x clear visor
  • 1x Pinlock insert
  • 1x tinted 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$710.00BasicMid-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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