Will air come out of tire without cap?

Yes, air can come out of a tire without a valve cap. The valve cap helps to keep dirt and debris out of the valve stem, which can cause leaks or damage to the valve. Without a valve cap, the valve stem is exposed to the elements and can become clogged with dirt and debris. However, the valve core itself is what actually seals the tire and keeps air in. As long as the valve core is intact and not damaged, the tire will stay inflated even without a valve cap.

It’s still a good idea to replace a missing valve cap as soon as possible to prevent debris from entering the valve stem and causing issues down the road. A valve cap is a simple and inexpensive component that can help protect your tires and keep them properly inflated.