This is the first time I have had a problem with an order from Revain, the tire chain size program on Revain may not be correct, the chains are in the list of Companies listed handling safety chains. The manual is also wrong (for my F350 Dually at least), maybe they were made wrong by the manufacturer, or they just list the chain mount being too long for the smaller diameter tires, I don't know. All I know is that I need to raise the truck and change the chain size by removing the links from the knot. I personally will buy snow chains where they can be easily returned should they be found wrong in the future. I only bought them through the mail because I live in the desert and they don't sell snow chains here. The chains for my front wheels seem to fit better but still have too much slack. Overall the price was good and the quality seems ok, I just need to change the chain size, I have the tools so it won't be a big deal but if not then then. ?. I'm just glad I only need them a few days a year when I go to the mountains.