HJC RPHA91 Riu MC1SF

HJC RPHA 91 - P.I.M.(TM) flip-up helmet, dual P/J-certified, with a pivoting chin bar

The HJC RPHA 91 features the award-winning modular design of the RPHA line in a premium P.I.M.(TM) shell. With a hinged chin bar to reduce noise and drag, a DMS sun visor, and dual P/J certification, it retains the core technology of the RPHA 91 Carbon, backed by a 5-year warranty.

HJC RPHA 91 Flip-Up Helmet: Compact, Quiet, and P/J-Certified

The RPHA 91 was designed to address one of the main criticisms of modular helmets: the noise and drag generated by the chin bar when in the open position. Its hinged chin bar reduces wind noise and air drag in a helmet that is slimmer and more compact than the RPHA 90, while remaining certified in both the closed and open positions thanks to its P&J locking system.

Its P.I.M.(TM)--Premium Integrated Matrix--shell, a high-performance material composed of epoxy-infused fiber fabrics, is available in four shell sizes to refine the fit. Its aerodynamic design improves airflow penetration, and the shell has been wind tunnel-tested to confirm this performance.

In front of you is the Pinlock-ready HJ-37 visor--with a 120XLT lens included in the box--which filters out 99% of UV rays and features anti-scratch and anti-fog coatings. The helmet features a 3-stage adjustable DMS sun visor, and the ACS ventilation system distributes air through 4 inlets and 6 outlets. The RPHA 91 remains compatible with the 2nd-generation HJC SMART 11B, 21B, and 50B Bluetooth systems, sold separately.

Key Features of the HJC RPHA 91

• P.I.M.(TM) - Premium Integrated Matrix shell: four shell sizes, wind tunnel-tested shell.
• Articulated chin bar: reduces wind noise and air drag, with a slimmer, more compact profile.
• Dual P/J certification: secure locking and release of the chin bar in the open position.
• HJ-37 Visor: Pinlock-ready (lens included), with anti-scratch and anti-fog coating.
• 3-step adjustable DMS sun visor.
• ACS ventilation: 4 air inlets and 6 air outlets.
• Compatible with SMART HJC 11B, 21B, and 50B 2nd-generation Bluetooth systems (sold separately).
• 5-year warranty.

Technical Specifications

• Helmet type: flip-up helmet, P/J-approved (full-face and open face helmet)
• Shell material: P.I.M.(TM) - Premium Integrated Matrix, fiber-reinforced fabrics infused with epoxy resin
• Number of shell sizes: 4
• Chin Strap: hinged, P&J locking mechanism
• Main visor: HJ-37, scratch-resistant and anti-fog treated, 99% UV protection
• Pinlock: 120XLT lens included in the box
• Design: Aerodynamic shell tested in a wind tunnel
• Sun visor: DMS - Dynamic Multi-Step Sunshield, adjustable to 3 positions
• Ventilation: ACS system - Advanced Channeling Ventilation System, 4 air intakes and 6 air outlets
• Interior: Antibacterial fabric that wicks away moisture and dries quickly
• Padding: Removable, washable, and interchangeable inner liner and cheekpads across all sizes
• Closure: New micrometric buckle
• Goggle slot
• Intercom: Compatible with SMART HJC 11B, 21B, and 50B 2nd-generation Bluetooth systems; sold separately
• Included in the box: Pinlock 120XLT lens, chin guard
• Sizes: up to 2XL
• Weight: approximately 1,650 to 1,750 g depending on size and measurement sources; weight may vary depending on helmet size--check the official technical specifications
• Certification: ECE 22.06, dual P/J approval
• Warranty: 5 years

Why choose the HJC RPHA 91?

The RPHA 91 offers access to the core technology of the RPHA 91 Carbon--articulated chin bar, DMS sun visor, P/J certification--with a P.I.M.(TM) shell that relies on high-performance fiber materials rather than carbon fiber. Its 5-year warranty confirms the helmet's premium positioning within the RPHA collection.

Its chin guard--thinner and more compact than that of the RPHA 90--significantly reduces wind noise and drag when open, a feature often overlooked on traditional modular helmets.

Comfort and Ventilation

The RPHA 91's ACS system distributes air through 4 inlets and 6 outlets--one of the most generous configurations in the RPHA modular helmet lineup. The antibacterial, removable, and washable interior complements this design, with interchangeable cheekpads available across all sizes.

Articulated Chin Bar and P/J Certification

The chin bar's pivot mechanism has been specifically redesigned to reduce noise and drag when open, while maintaining P/J certification that allows you to ride legally with the chin bar raised. The P&J locking system secures this position for confident use.

HJ-37 Visor and DMS Sun Visor

The HJ-37 visor features coatings that resist scratches and anti-fog properties, is Pinlock-ready, and comes with a lens included in the box. The DMS sun visor, adjustable to 3 positions, allows for precise adaptation to changes in light conditions.

Care Instructions

Clean the HJC RPHA 91 visor with lukewarm water and a soft microfiber cloth, avoiding any harsh household cleaners that could damage the scratch-resistant and anti-fog coatings.

Since the inner liner and cheekpads are removable, wash them regularly by hand with mild soap, then let them air dry away from direct heat sources.

Periodically check that the chin strap pivot and the P&J locking system are functioning properly to ensure your helmet remains reliable over time.

Frequently Asked Questions About the HJC RPHA 91

Is the HJC RPHA 91 ECE 22.06-approved?

Yes. The HJC RPHA 91 meets the European ECE 22.06 standard and has dual P/J approval, allowing for approved use with the chin strap either closed or open.

What is the difference between the HJC RPHA 91 and the HJC RPHA 91 Carbon?

The RPHA 91 uses a P.I.M.(TM) shell (fiber-reinforced fabric infused with epoxy resin), whereas the RPHA 91 Carbon features a carbon fiber shell. Both share the same pivoting chin guard and the same DMS sun visor; the RPHA 91 Carbon stands out with its exclusive finishes.

How does the chin guard on the RPHA 91 differ from that on the RPHA 90?

Its pivoting chin guard was designed to reduce wind noise and air drag, in a helmet that is slimmer and more compact than the RPHA 90.

Can an intercom be installed on the HJC RPHA 91?

Yes. The helmet is compatible with the HJC SMART 11B, 21B, and 50B second-generation Bluetooth systems, sold separately.