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Speed & Strength SS1700 Modular Helmet

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  • Sizing Chart

From the high banks of Daytona to Eight Mile and Woodward in Downtown Detroit, Speed & Strength is fueled by a two-wheel communal consciousness that's driven by the love of absolute acceleration. The revolution has begun.

  • A.T.P.A.™ (Advanced Thermo-Poly Alloy) shell.
  • Cool-Core® - Removable, washable and moisture-wicking liner.
  • Airstrike™ - Direct course ventilation system.
  • Lock 'N Load Plus™ - Rapid conversion shield replacement system.
  • DVD!™ (Drop Visor Design) - Single action, internal tinted retractable sun visor for daytime riding.
  • All Clear!™ Sight System - Optically correct, anti-scratch, anti-fog and UV-resistant face shield.
  • Single action chin bar release - Allows rider to open chin bar with one hand, even with gloves.
  • Speed Strap™ - Quick-release chin strap.
  • Weight: 1700 grams.
  • Meets or exceeds DOT and ECE 22-05 standards.
  • Note: Helmet ships with clear faceshield; tinted shields (shown) sold separately.
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SizeHead CircumferenceHat Size
X-Small 20.875 - 21.25in (53.0 - 54.0cm) 6 1/2 - 6 5/8
Small 21.625 - 22in (54.9 - 55.9cm) 6 3/4 - 6 7/8
Medium 22.5 - 22.875in (57.1 - 58.1cm) 7 - 7 1/8
Large 23.25 - 23.625in (59.1 - 60.0cm) 7 1/4 - 7 3/8
X-Large 24 - 24.375in (61.0 - 61.9cm) 7 1/2 - 7 5/8
2X-Large 24.75 - 25.25in (62.9 - 64.1cm) 7 3/4 - 7 7/8


1. Measure your head size. To do this, pass a tape measure horizontally around your head at a height of about one inch above your eye- brows. When done properly, you will have measured the largest part of your head.

2. Check your measurement with the helmet sizing chart and select the closest size. As the helmet may not always meet your head size exactly, and your head measurement may fall between two sizes, first try the smaller size.


1. Expand the helmet opening by pulling outwards on each chinstrap, and slide your head into the helmet. If you are unfamiliar with helmets you may be reluctant to pull the helmet down, as it may feel too tight. Even if the helmet is difficult to put on, please use the smallest helmet possible. The helmet should feel snug. If the helmet is not tight, it is too big for you. New helmets will break in and loosen slightly over time.

2. Once the helmet is on:

  • Check that the helmet inner lining fits snugly all around your head.
  • Check that the top pad presses on the top of your head.
  • Check that the cheek pads press up against your cheeks. When you open and close your mouth, you should drag your teeth along the inside of your cheeks.
  • Check to make sure that you cannot easily slide your finger into the helmet along the side of your temple.
  • Hold the helmet with one hand on each side. Without moving your head, try to move the helmet up and down, and side to side. You should feel the skin of your head and face being pulled as you try to move the helmet. If you can move the helmet around easily, it is too big. Try a smaller size. Please note that during this check, the chinstraps should be properly fastened.