Does not seep air - by that I mean that I am not topping up my tyres every month. I replaced all three previous Goodyear tyres and tube with new Goodyear ones. This time however instead of the natural rubber tubes, I ordered the butyl tubes. They certainly hold air and come with the nice yellow official airplane tire cap as well.

Ive had this tire about a month, (Purchased in Feb) no problems as of now. Well see how this handles flying in the summer months. Tire was easy to work with.

It is a tire of choice and performance.

Good price, quick delivery! Thanks!

This pains me to say, but these tubes are very low quality. Ended up with a flat because of the tube at a very inconvenient time. The tube had worn through at the top, away from the area where the rims meet. It was not pinched. This should not happen. And it was paired with a goodyear tire. Do not buy.