Originally Posted by BoredAtBMBW
I'm thinking about adding a 90mm ski to my quiver next year (to allow me to ski more of mountains I'd go to on vacation, and even the occasional local deep day).
However, I may think twice if carving on a 90mm ski is really as bad on the knees as people say it is.
Just wondering how painful/dangerous it is.
As someone with bad knees who skis widths up to 115, east and west, would say that it's not something you can quantify. Especially pain. Yes, I can tell the difference between a day on a 88-98 ski on groomers and a 68-72. Especially if you try to get the same edge angles. But why would you be doing that on a 90 mm? In more realistic conditions, like soft snow and groomers to get to same, I want the added ease and stability of a wider ski, not mention the ability to smear or pivot a turn easily. Hitting a downed tree is not knee friendly, either. You want torque on knees? Try too many years doing powder on Volkl 6*'s. Dangerous if your knees are OK? Naw. Other issues are far more likely to mess seriously with your knees, like hitting a bump trough wrong, or taking air and landing straight legged on firm, or going backseat and falling sideways.
Now my knees do not much like spending major time carving on 115 mm skis, and I think Fatypus's and Toons are made to put orthopedic surgeons' kids through school, but you're not asking that, are you?