HJC - RPHA ST Knuckle Helmet

Product Code: hjc-rphast-knuckle-helmet
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HJC - RPHA ST Knuckle Helmet

The HJC RPHA ST Knuckle Helmet is HJC's latest offering in the world of technologically advanced motorcycle helmets. HJC has specialized in manufacturing motorcycle helmets exclusively since 1971. HJC's success worldwide has been attributed to the combination of that manufacturing experience, innovative ideas, and reasonable prices. It is HJC's goal to provide high quality, comfortable, and reasonably priced helmets to motorcyclists around the world.



  • Advanced P.I.M. (Premium Integrated Matrix) Construction: Fiberglass composite shell made from a blend of carbon fiber, fiberglass, Aramid and organic non-woven fabric. Integrated SunShield: Smoke tinted SunShield deploys quickly and easily.

  • Max Air-Flow Top Vent: Variable airflow is adjusted by glove-friendly intake vent

  • SilverCool Plus™ (Ginkgo) Interior: Moisture-wicking and odor-free interior with advanced silver and anti-bacterial fabric. Crown and cheek pads are removable and washable.

  • RapidFire II™ Shield Replacement System: Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation for efficient operation.

  • Pinlock® Prepared HJ-20ST Anti-Scratch Shield: Optically superior Pinlock®-prepared 2D face shield provides 95% UV protection. Innovative center one-touch open / close locking system is designed for an extremely secure seal. 5 mm initial shield position by releasing shield lock system. Includes Pinlock® 100% Max Vision anti-fog insert.

  • HJ-L1 SunShield Visor System: One-touch integrated smoke-tinted anti-scratch SunShield deploys and retracts quickly and easily.

  • Three (3) different shell sizes.

  • Eye Glasses and Sun Glasses Friendly EPS Shape.

  • Weight: 3.26 pounds / 1480 grams (size Medium).

  • Standard Certifications: DOT.

  • Note: The HJC RPHA ST Helmet ships with a Clear shield uses the HJC HJ-20M Shield as a replacement or upgrade.