Ok then, these are not plastic. Polyurethane is a synthetic rubber type compound. When people replace body and suspension components they will use polyurethane because it stretches and absorbs loads better then even rubber. this is the type of material I speak of. the hard plastic type that fisher uses on smaller blades are a hard type plastic(probably ABS or the like) not urethane.
Well anyway it is tough stuff, for one they are about 2" thick and that trnsferes the load over a large contact area. Next it is pliable yet tuff to cut. I needed a skill saw with an agressive tooth blade to cut it, and even then it bogged way down. A hack say and saws all did nothing.
the firm I bought them from are evn using them for ground engaging equipment(loaders,graders) and are getting very long life out of them.
Now since we have seen no snow, I cant say how they work, however I did on a 50 degree day drive with the blade down for about 1 mi and saw no evidence of wear whatsoever.Plus I get sqeegee like action on wet surfaces and no curb or pavement damage.
I will be better able to tell how they work if we ever get snow. However dont be so shocked about this, Virginia DOT has done long term testing and found the blades to be very reliable and cost effective. Just because it is new, doesnt mean it is junk. Think outside the box.
Dino
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