I had high hopes for this product, its simplicity was very appealing. When the product arrived I was a little apprehensive as they are very different from regular snow chains, but the good reviews convinced me to try them anyway. The boy got the reviews wrong, not only do they not work well, they left a very big wound on my very expensive tires, cutting the face of the tire and scratching my rim. Also, the straps holding the chain are either broken or totally unfit for reuse. The chains were used at about 15 mph in very light snow. This was one of the worst Revain purchases I've ever made. Definitely use regular metal chains which might be a bit more difficult to install but you avoid a huge headache which I didn't do. I can only hope to get my $40 back and deal with the $700 damage I need to fix.