Just had a 3.25" nail yanked out of a tire yesterday. Went to a local service station and set the air suspension to very high. They pulled it out without having to do any additional jacking and patched it right there. I did call first however and make sure they thought they could do it. A couple of places wouldn't touch 21" tires. Even managed to sneak in a test drive afterwards for a very knowledgeable car enthusiast that was waiting for service at the same time. Never having had to deal with a slow leak before (had blowouts though), it was a relatively and quick painless process in this particular case.