it will still be wound onto the rim with a binding agent Dave.... the test is weather or not it has the same hardness / durability as natural rubber. as stated above they tend to spin it onto the rim, cure it / steam it to the correct hardness then profile the wheel on a lathe. the problem with our carriers is the horns on the tracks tend to catch the edge of the wheels and chunks of rubber can get torn out... the only way to see if the material is ok to use is to folk out and test it