Larger Diameter Tires than OEM - Issues with vehicle / warranty / etc.

[gestut]

I don't see it being an issue and Toyota is telling you "other issue" just to protect themselves. The factory diameter for off road trim is 32.6 so fit won't be an issue. I think the speedometer tool is likely a good estimate, i'd imagine it changes vehicle to vehicle though. Plus most jurisdictions aren't ticketing for going 3 MPH over. Thursday I hope to be taking mine up to 33.2 and not giving it a second thought.

Will there be any performance degradation and stress on engine / transmission from larger tire..?I wonder if off road trim has different final gearing vs base sr5.

I have base sr5 and want to upgrade to bigger tires as well

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[richiecass]

I have 285 70 17 wild peaks on my sr5. The speedometer is 2 miles an hour off. I had it at the dealer and they said there was no calibration that can be done to change that. So the speedometer register is 2 miles an hour faster than I'm actually going.