It has come to the time where I need to start planning for my next set of tires. My 37" boggers are about wore out and I need to re-gear. I am looking at the new tsl sx ll in the 37X12X15 or I have two used 38.5X14 tsl sx. I do have the front 4.88 for the 37's. So either four new tires and one set of gears or two new tires and two sets of gears.