Depends on the tire... Ridge grapplers are 34.7 vs 34.4, others are closer to 35. It's not a big enough difference to matter, but I doubt we can fit 37s.35x12.5 is not a 'move up'. It is the same size as the 315/70R17
315 Goodyear Duratrac is 34.4 x 12.7
35x12.5 BF Goodrich K02 is 34.5 x 12.5
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