What is the largest tire size that will fit a 2002 Toyota 4Runner?

Answer 1

I should have mentioned that if you change the diameter of your wheels it will cause an inaccurate speedometer reading. The speedometer is calibrated by telling the needle (you see in the MPH gauge on your dash) the number of times the wheel spins for a given distance. It's programed with OEM specs. So if you make the diameter smaller it will take more rotations of the wheel to go the same distance & larger will take less rotations causing an inaccurate speed reading because the speedometer has no way of knowing you changed the diameter spec. But not to worry there is something that will take care of this. Maybe you've heard of it, Plus One Sizing. It allows for an increase in wheel/tire diameter without significantly changing the "rolling" diameter. As the wheel diameter gets larger the tire gets wider and it's aspect ratio gets lower. This will allow you to keep your speedometer accuracy. There is also Plus Two & Plus Three ect depending on how large you want/can go.Search the term Plus One Sizing or Plus One Conversion Chart for more info. Hope this helps. I have a 2000 4Runner SR5 V6 4WD and I just put on 20" Eagle Alloy Chrome VooDoo wheels with 285/50/20 General Grabber UPH tires. No special lift package or anything like that and there is no rubbing at all. OEM on my truck were 16" wheels and 265/70/16 which were not stock but ordered. Stock were 15" wheels with 225/75/15. As you can see I went quite a bit larger than stock. I'm pretty sure that without any modifications they are the largest tires for my truck. I would think you should be able to go that large on your 2004 but a good wheel/tire shop will tell you for sure. Maybe you can go larger. Keep in mind my tires are not All-Terrian.