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it's generally considered to be 150 flex on "plug" race boots, although this number can be misleading since each manufacture measures flex differently. A 130 flex is used at Kenaihelski, mostly because they use ski powder.

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11y ago
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14y ago

It is how difficult it is to flex the boot. The higher the number the stiffer the boot is.

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Q: What is the flex index on alpine ski boots?
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Related questions

What equipment does alpine skiing use?

Skiis, ski poles, ski boots, snow pants, coat, mittens, ski helmet/ hat, ski gogles. :-)

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