my brother got a set of phoenix 28.5x10.5 on a 10 in rim. anyone have these or an idea on tire pressure to start at? leaf spring car runnin 11.60's.

Try 10 1/2 psi.Go up 1/2 pound at a time.check the wear pattern on the slicks.you want them scruff across as even as poss ible

I Used to put 10.5 11 in cold (70 deg day) and after a run right when I parked it they would be at 13.

I run my 29.5 X 11.5"s at 13 to 13.5

thanks guys!! well he got to make 1 hit last night and tried 12.7 and it hooked great. got rained out today so gonna go out wednesday night and try some things. gonna go up to about 13 to 13.5 because it was scuffed on the outside but not in the middle. see ya'll this weekend!!