Looks Good, Fits Right

Item# S1408017011
MSRP: $99.95

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Description & Specs

Simplify, simplify, simplify! The K2 Ally helmet is the easy in-mold choice for safety, style, and just the right amount of snugness thanks to a customizable 360 K2Dialed™ fit and a breathable, removable full wrap liner. The Ally is also available in an extra-small size so no one is forced to scour the kids’ aisle for the right fit.

XS, S, M
Helmet Construction:
In Mold
Fit System:
360 Dialed
Bike Certified:
  • Full Wrap Liner
  • In-Mold
  • 360 K2Dialed


  • In-Mold Construction

    In-Mold is the premium construction for ultra-lightweight performance and is characterized by an EPS liner that is molded directly to a lightweight poly-carbonate (PC) shell. The result is a construction so light you'll forget it's even there.

  • Passive Channel Venting

    Channels on the inside surface of the EPS direct air-flow between your head and the helmet, removing moisture and excess heat for all day comfort.

  • Full Wrap Liner

    A comfortable, washable, full-coverage, breathable liner design that wicks away moisture to prevent overheating and seamlessly integrates fit and audio systems.

  • 360 K2Dialed

    The 360 K2Dialed is an evolution of the K2dialed Fit System, delivering unparalleled comfort around your entire head. An intricate web design results in 360 degrees of even pressure distribution for a secure and snug fit that you can customize with the twist of dial.

Size Chart

Product Size Chart
  XS S / Youth M L / XL
Circumference (inches) 18 7/8" - 20 1/8" 20 1/2" - 21 5/8" 22" - 23 1/8" 23 1/2" - 24 3/8"
Circumference (centimeters) 48 cm - 51 cm 52 cm - 55 cm 55 cm - 59 cm 60 cm - 62 cm