Originally Posted by swiftskier
Anyway, on topic, a foam core ski won't last more than 40 days of hard skiing. It looses it's camber and tortional rigidity.
I don´t want to argue if/why 40 and/or not 37 or 45 days nor about the definition of "hard skiing" (skier´s skills, weight, terrain, speed,...?).
I only want to point out that there´s not foam like foam. A lot of skiers hearing "foam" (not in liners!) have the association of some cheap stuff good just for novices.
The "foam" (PU) used in the cores of some high-end skis, sometimes in combination with wood, is IMHO different than the cheap injected material in low-end skis.
I wouldn´t wage to set the 40-days lifespan for any "foam core ski".
Many of us were happy users of the legendary Rossignol ST/SM Competitions in the 70s. They both had low-density polyurethane-foam core. These skis won 6 medals at the 1976 Olympics (the Canadians would remember Kathy Kreiner).
I had about 4 STs and they were incredible skis with definitely more life than 40 days.
(The only one I was not satisfied with was one with ST topsheet but metal layers and probably wood core - never found out what the ski really was...).
I have extensive experience with Czech SPORTEN skis (lots of testing, tuning - I´m heading for the mountains today with 5 pairs of their SL skis to prepare them for a magazine test).
SPORTEN has some inexpensive foam-core skis with excellent durability. I am really surprised. Sure, for my private use I prefer wood-core race skis but I would never underestimate solid foam-core construction.
There´s not foam like foam.