This product has been discontinued

Thor Bio Quadrant Off-Road Helmet


  • Manufacturer: Thor


THOR Quadrant Off-Road / MX Helmet

The Quadrant Helmet offers outstanding value with uncompromising quality. Designed to meet and exceed both DOT and SNELL standards, the Quadrant is a serious piece of equipment. Every detail has been refined and improved to provide the best fitting, best performing helmet in its class. From the plush interior to the molded roost guard and dual-density styrene liner, the Quadrant sets the standard for other offroad helmets to follow.


  • Extensive venting with intake and exhaust ports to channel heat away from the head
  • Plush removable/washable deluxe comfort liner
  • Molded goggle grabber is unified with eyeport mold for enhanced peripheral vision
  • Lightweight polycarbonate shell construction for maximum strength with minimum weight
  • Integrated mouthguard design for maximum airflow
  • Molded roost guard for protection
  • DOT and SNELL approved