K2 SpYre 100 Ski Boots - Women's 2015

sku# 89221
K2 - SpYre 100 Ski Boots - Women's 2015
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Product Info

The award-winning K2 SpYre 100 Ski Boots are built for women who ski hard. This means the SpYre 100 is stiff for responsiveness and is relatively tight-fitting for fast and precise turns, but loaded with customizable features so your feet stay happy throughout the day. A woman's specific construction not only shortens the cuff height, but also reduces the boot volume in targeted areas like the heel.The K2 SpYre 100 Ski Boots also feature the PowerFuse SpYne and Energy Interlock, a cuff/shell connection that foregoes the traditional rivet, for a smoother, more efficient flexing boot. Unlock both power and comfort, AKA the holy grail of ski boots, with the Spyre 100 Ski Boots from K2

Product Details


Women's Specific LastLower volume // Narrower in the heel // 15 mm lower cuff height to accommodate a woman's lower calf for a comfortable, precise fit.

Last: 100 mmK2's 100 mm last is perfect for most average width, average instep height feet.

Asymmetrical Toe BoxK2 matches the toe box to the natural curvature of your toes for a more precise and comfortable fit.

Navicular PunchA bump is pre-formed in the navicular area of the medial ankle where many skiers experience pressure.

FitLogix™ DesignA design philosophy that puts your skiing first, optimizing foot comfort and boot performance.


Flex: 100A stiff, but short of race stiffness flex for advanced to expert all mountain skiers


LuxFit Intuition® LinerA lasted, thermo moldable liner that gives you a perfect full custom fit.

Lasted LinerLasted liners are formed around a standard foot shape for improved out of the box comfort.

Moldable Asymmetric TongueOffering a left / right specific lower leg fit and is heat moldable for ultimate customization.

Shell Materials

Cuff / ShellPolyurethane

PowerFuse SpYneA rear co-injected “Y” shaped design that adds strength and power to the Energy Interlock, the PowerFuse SpYne maximizes fore/aft flex efficiency and lateral stiffness for sustained performance and responsiveness in all terrain. Because of the SpYne, we are able to optimize materials in the cuff and shell, eliminating excessive vibrations in rough terrain.

Energy InterlockA rivet-free technology that integrates the cuff and shell of the boot. The Interlock stretches when the boot is flexed forward, and the energy is released throughout the turn, creating a smoother, more natural flex than riveted designs.

Forgiving Shell MaterialsSpYne construction allows the use of more forgiving materials at the cuff / shell junction, making entry and exit of the boots easier.


Dual Adjustable Cuff AlignmentAdjust +/- 2.2 degrees on medial and lateral sides for a total range of 4.4 degrees. This enables adjustment to the lower leg angle for maximum comfort and performance.

Power Wedge / Forward LeanThe Power Wedge is a removable spoiler for accommodating varying calf shapes and adjusting your desired forward lean angle. The Power Wedge increases forward lean by two degrees, moving the angle from 12 to 14 degrees.


Alloy Buckles6060 T6 Extruded hardened aluminum alloy built with a minimalist lightweight design

Power Strap

35mm Velcro Power Strap


Replaceable OutsolesDual-injected Thermo Plastic Rubber (TPR) with Thermo Plastic Urethane (TPU) increases the life of your boots and provides secure footing whether walking on rock, ice, or stairs.

Padded Mid-GripDuel Injected Thermo Plastic Rubber (TPR) for added grip and traction while walking on rocks or riding on snowmobiles.


  • Ability Level: Advanced-Expert More 
  • Ski Boot Flex: Very Stiff
  • Flex Index: 100
  • Forefoot Width: 100 mm
  • Number of Buckles: 4
  • Ski Awards: Ski Magazine Gold Medal Gear, Skiing Magazine Official Selection
  • Warranty: 1 Year

Other Notes

K2 products can only be shipped within the United States