On my way to the Zoo last year I hit at least 110 - that's with the 31.5's. It felt stable enough to me... but then again I have had a '76 CJ-5 with a cherry bombed 304, 3-speed, and 31's up to 110 at night when the soft top started collapsing onto itself... and me! What a rush... but I would never do it again... or would I...