I run 4.30's with a 30" tall tire and when I run the highway and cruise at 60 to 65 mph I turn around 3200 rpm's. I have driven to Carlisle like that which is all the way on the highway and its almost 2 hrs as its about 90 miles. I drive the highway a lot around my area also and have not had any issue's at all. I have been driving on the 493 like that since 2011 and on the 440 like that from 2006 to 2011. Ron