Trailhunter max tire size

[Ruissimo]

I have a 25 TH and the speedometer is off by 2mph at 60. Rather than installing a Hypertech calibration in the dash, bigger tires make more sense(I'd probably do it anyway at some point). From what I gather here, I should be able to go to 285/70/18 KO3s with no issues, correct? Anyone here have that size on their TH who can weigh in? Based on the math, that size should make the speedometer dead on and look good at the same time. TIA

I see no one responded to your question. This is the exact setup I want, as I love my OEM wheels. I heard the spare won't fit. Can anyone also confirm that? Thanks in advance.

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[FlyAngler]

I'm running 285/75/18, so not quite what you're looking for. I did have to make some changes to get rid of the rubbing (which was worse when aired down, so check that too). See my build thread (sig) for details and pics if helpful.

Re: the spare, there just isn't enough room for this size...BUT, someone recently noted that an option is to run the spare with less air and a ratchet strap around it. I haven't tried it yet, but that just might work. Especially with the onboard compressor. For now, I've kept the original sized spare. As long as it is a relatively short trip out of the woods that should work fine for me. The 2" difference is diameter is just 1" from each axle, so should run OK for a bit. For now, that's my "solution". I guess "compromise" would be a better term. HTH