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HJC · RPHA 91

HJC RPHA 91 Anthrazit

VERIFIZIERTE TECHNISCHE SPEZIFIKATION Modular ECE 22.06, DOT PIM Evo 1700g
CAD ARCHITECTURE BLUEPRINT

Empirical Geometry Profile · Verified Laboratory Cataloging

Quick Facts at a Glance

Category Modular
Certifications ECE 22.06, DOT
Measured Weight 1700 g
Shell Material PIM Evo
Head Shape Fit Intermediate Oval
Retention System Double D-Ring
SAFETY & CERTIFICATIONS

Verified Safety Snapshot

How this helmet’s verified certifications map to recognized safety homologations and crash testing.

Certified Homologation ✓ ECE 22.06, DOT
Rotational Protection Multi-layer impact-absorbing liner
SHARP Impact Score Not tested by SHARP
Retention Mechanism Double D-Ring
Emergency Release System Not specified

Safety standards compliance is based on official manufacturer documentation and public safety laboratory test results. Always verify regional compliance labels on the physical helmet prior to use.

FIT & SIZING

Verified Fit & Sizing Guide

Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.

Your Head Circumference 57 cm
52cm 55cm 58cm 61cm 65cm
Select Head Shape Profile
Recommended Helmet Size
Medium
Optimized contours.
Perfect for standard intermediate head profiles.

Intermediate oval head shape ensures a comfortable fit for most riders.

How to measure

Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.

Design Concept & Background

"Safety First"

Elevate your ride with the HJC RPHA 91 Modular Helmet, engineered for superior performance and protection. This cutting-edge helmet boasts sleek styling, crafted to reduce wind resistance and enhance aerodynamics. Advanced engineering ensures optimal ventilation, keeping you cool and focused on the road. The RPHA 91 features a wide field of vision, providing unobstructed views of the surroundings. With its PIM Evo shell construction and multi-layer impact-absorbing liner, this helmet delivers unparalleled safety and protection. Whether you're tackling long highway stretches or navigating twisty mountain roads, the HJC RPHA 91 Modular Helmet is the ultimate touring companion, engineered to keep you protected and performing at your best.

Key Highlights:

PIM Evo shell construction Modular design Advanced ventilation system Multi-layer impact-absorbing liner Wide field of vision Intermediate oval fit

Rider Profile & Intended Use

Riding Style Racing
Helmet Category Modular
Internal Fit Shape Intermediate Oval
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Product Concept & Specifications

HJC (South Korea)

Engineering & Biomechanical Safety Analysis

Die HJC RPHA 91 Anthrazit zeichnet sich durch die fortschrittliche PIM Evo-Schalentechnologie aus, die für überlegene Stoßfestigkeit und leichtgewichtige Haltbarkeit sorgt. Das modulare Design vereint den Schutz eines Vollvisierhelms mit der Flexibilität eines Klapphelms, während ein hochentwickeltes Belüftungssystem für optimalen Luftstrom und Komfort unter allen Bedingungen sorgt. Die ovale Kopfform bietet einen eng anliegenden, sicheren Sitz, und die hochwertige Innenpolsterung steigert den Komfort auf langen Fahrten. Sicherheitsmerkmale umfassen einen mehrschichtigen EPS-Innenliner und eine verstärkte Kinnpartie für zusätzlichen Schutz.

The HJC RPHA 91 Anthrazit is engineered as a high-integrity Modular protective system, utilizing a structural shell constructed from PIM Evo. This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the internal multi-density EPS liner.

Certified to ECE 22.06, DOT protocols, the architecture is subjected to rigorous linear deceleration limits and oblique impact evaluations to mitigate rotational acceleration forces associated with diffuse axonal injury. For a deeper breakdown of rotational thresholds and impact testing speeds, consult our ECE 22.06 vs DOT vs SNELL engineering benchmark.

Internal geometry follows a Intermediate Oval cranial profile, designed to mitigate focal pressure hot spots across the parietal ridges while maintaining uniform radial clamping pressure along the zygomatic arch. Riders seeking optimal retention stability and break-in guidance should review the cranial aspect ratios and head shape guide as well as our 3D cheek pad density protocol.

Shell composite integrity and acoustic sealing are further optimized through channelized EPS porting and aerodynamic laminar profiling. To learn how shell composites resist stress cracking under prolonged environmental cycling, inspect the composite material comparative matrix.

Fit & Shell Structure

Intermediate Oval Shape

Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.

Schalenkonstruktion PIM Evo Äußeres Strukturmaterial
Measured Weight 1700 g (3.75) Ungefähres Gewicht in mittlerer Größe
Warranty 1 Jahr Dauer der Herstellergarantie
Hauptanwendungsbereich Racing Optimierte Fahrorientierung

Safety & Certifications

Zertifizierung ECE 22.06, DOT Zertifizierter Sicherheitsstandard
Rotational Protection Multi-layer impact-absorbing liner Reduziert Rotationsaufprall
Notentriegelung Not specified Schnellentnahme der Wangenpolster
Kinnriemen Double D-Ring Art des Kinnriemenverschlusses

Acoustics & Aerodynamics

Geräuschpegel 88 dB Gemessene Windgeräusche bei Geschwindigkeit
Belüftung 8/10 Bewertung der Belüftungsleistung
Im Windkanal getestet Not specified Optimierte Helmschalen-Aerodynamik
Pinlock-Beschlagschutz Nicht enthalten Antibeschlag-Visiereinsatz

Technology & Convenience

Integration von Kommunikationssystemen Generic Speaker Cutouts Verfügbarkeit einer Aussparung für eine Gegensprechanlage
Für Brillenträger geeignet Not specified Brillenkanäle im Innenfutter
Visiersystem Not verified Integrierte herunterklappbare Sonnenblende
Herausnehmbares Innenfutter Not verified Waschbare Innenfuttermodule

Regional Legality & Compliance

🇺🇸 US Street Legal
Required: DOT

Meets DOT FMVSS 218 standards for street use in the United States.

Regional Legality Guidance

US

Status: Street Legal

Required: DOT

Meets DOT FMVSS 218 standards for street use in the United States.

Certification Documents & References

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Data Confidence & Verification Provenance

Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.

Manufacturer Source
HJC Official Specification
Safety Testing Agency
ECE 22.06, DOT Homologation Record
Verification Status
✓ Verified Data
Last Audit Date
2026-06-12