Allen -
If all else fails - and I'm not suggesting it as a first step - upsizing to 15-inch Marathons is easy if you have enough clearance above the tire. According to Dexter Axle, you should have about 3 inches, to allow for suspension flexing over big bumps. My TM had 3 inches, and hence only 2-1/2 inches after the conversion. I elected to go with it, and avoid hitting big bumps at high speed.
Bill
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