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First Gear

FIRSTGEAR Ajax Adventure Helmet Black - 2XL

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SKU: FSG446689
Price:
$150.99 $199.99
1500 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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Product Details

Product Description
Part Numbers
Sizing & Fit
Designed specifically for adventure riders, the Ajax features an injection-molded ABS shell with a moisture-wicking, dual-density EPS impact liner.
Designed specifically for adventure riders, the Ajax features an injection-molded ABS shell with a moisture-wicking, dual-density EPS impact liner.

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