I'm so sick of "standard" tires flexing. I can't believe companies still make tubulars. I can't either to ONE tubular tire on one of my "guns" that wouldn't deflate for no apparent reason. I fitted these tires and ***POF*** NEVER flattens out. They even roll easier as they're pretty stiff. But they are "not flat! I would also recommend her to friends and family. It's a shame that with the already expensive gear we all buy, we have to spend so much money to "get it right!". I use them on a 3500psi, 3gph pressure washer.