First off, Thank You !!
And secondly, the tires are 15/39.5-16.5
I had 38 inch Ground Hawgs before which measured 36 inches tall and with the 4.88's the gears were too low IMO for highway speeds. The new tires measure 39 inches tall and at 80mph Im right at 3000 rpms so I think the gearing is much better now.