HJC · RPHA 11 Pro
HJC RPHA 11 Pro Semi Flat Black
Quick Facts at a Glance
Verified Safety Snapshot
How this helmet’s verified certifications map to recognized safety homologations and crash testing.
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.
Verified Fit & Sizing Guide
Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.
The RPHA 11 Pro features an Intermediate Oval head shape. It is known for a snug, race-oriented fit; riders between sizes should generally size up due to the aggressive cheekpad contouring.
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"
The HJC RPHA 11 Pro is a high-performance helmet designed for track and racing enthusiasts. Its sleek styling is not just visually appealing, but also engineered to optimize aerodynamics, reducing wind resistance and drag. Advanced engineering has gone into the development of this helmet, featuring a PIM+ shell for enhanced impact resistance and a three-layer cheekpad design for a comfortable fit. The helmet's ventilation system is a key feature, boasting a large air intake and exhaust system to keep riders cool and dry even during the most intense sessions. The RPHA 11 Pro also features a MIPS (Multi-directional Impact Protection System) for added protection against rotational forces. With its advanced safety technology and premium features, the HJC RPHA 11 Pro is the ultimate choice for riders who demand the best.
Key Highlights:
Rider Profile & Intended Use
Waar te koop
| Verkoper | Prijs | Availability | |
|---|---|---|---|
| Amazon (US) | Actuele prijs bekijken | Op de website bekijken | Prijs bekijken → |
Prijsverloop & trends
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Product Concept & Specifications
HJC (South Korea)Engineering & Biomechanical Safety Analysis
The HJC RPHA 11 Pro features advanced safety with its PIM+ shell, offering lightweight durability and impact resistance. Its intermediate oval head shape ensures a snug, comfortable fit, while advanced ventilation channels promote airflow to keep riders cool. The helmet's track/race design prioritizes aerodynamics and performance, making it ideal for high-speed riding.
The HJC RPHA 11 Pro Semi Flat Black is engineered as a high-integrity Track/Race protective system, utilizing a structural shell constructed from PIM+. 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 22.05, 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.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Regional Legality & Compliance
Meets DOT and ECE 22.05 standards
Meets DOT and ECE 22.05 standards
Regional Legality Guidance
Certification Documents & References
Interactive Size & Fit Finder
The RPHA 11 Pro features an Intermediate Oval head shape. It is known for a snug, race-oriented fit; riders between sizes should generally size up due to the aggressive cheekpad contouring.
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.
Geo Pricing & Availability
| Country | Price | Availability | Source | Updated |
|---|---|---|---|---|
| US | 399.99 USD | In Stock | Official | 2024-05-22 |
| CA | 549.99 CAD | In Stock | Official | 2024-05-22 |
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Compatible Motorcycles for the HJC RPHA 11 Pro Semi Flat Black
Aerodynamically sculpted for high-velocity chin-on-tank tuck, negative lift, and wide track peripheral visibility.
Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.