Dan, I just noticed that the Diamond Back Auburn Deluxe 700R15 is 29.4” tall. Is that too tall to clear the fenders etc. on a stock suspension 3100?
If you have stock suspension and unmodified ride height, those tires will fill your wheel wells very nicely and there should be no interference through the entire turning range. My '51 is still sporting some very old bias ply "pie cutter" tires that stand that tall and have never been a problem for clearance.
