I had to return them as you can't reach the valve stem on the rear tires. I just couldn't be in a situation where I had to remove the nuts and dummy wheel to check the air pressure and add if needed. The product appears to be of good quality and the bolt on stud method is an improvement over the factory installed plastic tabs. My rating would have been higher and I would have kept it if there had been a slot in the back for valve stem access. The return cost me $50 due to the shipping cost so I was very disappointed.