Search Suggestions
Menu

Arai Quantum X / DT-X Helmet Liner Sizing

Interior Liner Thickness for Quantum X / DT-X

Helmet Size  Lining Code 12 mm 10 mm 7 mm 5 mm
XS I Optional Standard
S II Optional Standard Optional
M III Optional  Standard Optional Optional
L III Optional Optional Standard Optional
XL IV Optional Standard Optional
2XL V Optional Standard

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

$39.99/yr.
Spend Less. Ride More.
  • 5% RPM Cash Back*
  • 10% Off Over 70 Brands
  • $15 in RPM Cash When You Join
  • Free 2-Day Shipping & Free Returns*
  • And more!
Become a member today! Add RPM to cart