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Thor Quadrant Fragment Youth Off Road Helmet.

The Thor Quadrant Fragment Youth Off Road Helmet boasts of a superior shell without the additional weight. Combined with adequate venting courtesy of the oversized forehead venting and dual density liner; you can feel safe and secure in this dirt bike helmet.


  • Blended Acrylonitrile Butadiene Styrene and Polycarbonate shell provides maximum coverage without excess weight
  • Molded roost guard for added protection
  • Oversized forehead venting
  • Direct flow mouth guard with mesh filter
  • Dual-density expanded polystyrene liner
  • Plush removable/washable comfort liner
  • Molded rear goggle strap holder
  • DOT and ECE 22.05 approved

Size Chart

Wrap a tape measure horizontally around your forehead. Select the helmet that is the closest fit to that size. A helmet should fit snug on your head. If it moves while wearing, it is too large. If it is painful to wear, it is too small.

Size Chart

Size Age Hat Size Inches Centimeters
Small5 - 66 1/8 - 6 1/420 5/8"49cm -50cm
Medium6 - 86 3/8 - 6 1/221 1/8"51cm -52cm
Large8 - 106 5/8 - 6 3/421 1/4"53cm - 54cm
X Large10 - 126 7/8 - 721 5/8"55cm - 56cm

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