These are not well built for the street. I put them on and a few days later one of the caps came loose from the top and the tire immediately deflated. Luckily I was in the driveway. These caps let air through to press on the gauge. But. If they are fitted incorrectly, the cap will come off and you will end up with a flat tire. So the idea is wonderful, but the factory worker doesn't understand anything and the inspector is blind. I would generally avoid these baseball caps, but I wouldn't buy anything from this company either. They sell UNSTANDARD things.