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Old 05-22-2009, 09:13 PM #1
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Exclamation Is putting bigger size tires on '99 4Runner a bad idea?
I got a 1999 Toyota 4Runner. It is the basic edition
looks like this: http://graphics8.nytimes.com/images/...4runner-02.jpg

Now my question is: Since the actual manafacture tires on the vehicle is a little small, would it be a bad idea to get a little bigger tires for it.

Like if any of you here is a good 4Runner fan, I am sure you have noticed that the tires that are on the Limited Edition ones are bigger in size which makes the car look much better.

I am not talking about huge tires, but normal a little bigger to make it look like the Limited Edition ones (perhaps those sizes).

I heard that it is a bad idea because it messes up with the speedometer reading etc.

Please let me know...
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Old 05-22-2009, 09:25 PM #2
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the only thing that it will hurt is ur gas mileage.. 265 won't mess with ur speedometer reading.. 285 will start 2 throw it off a little.. so 2 sum up its not a bad idea @ all
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Old 05-22-2009, 09:26 PM #3
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Biggest size you can run is 265/75/16. Stock size for Limiteds is 265/70/16.

Do you have 15" rims?

Yes, changing tire size messes with the odometer and speedometer. It depends on what tire size you choose.
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Old 05-22-2009, 09:32 PM #4
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Thank you so much guys.

Yes, I do have 15" rims. But is there a size that is in between what my size is at the moment and what the Limited's carry?

And would that have a big impact on gas/odometer reading?
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Old 05-22-2009, 09:35 PM #5
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What size are you running right now?

I'm sure there are quite a few different sizes to choose from.

Do you want to stick to 15" rims?
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Old 05-22-2009, 09:39 PM #6
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if u got a 2wd then prob running 225.. u could go with 245 or 255 and it would b a large improvement and still won't affect anything that enough for u 2 notice
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Old 05-22-2009, 09:51 PM #7
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I have the same 4runner you are talking about, and just put on 31x10.5x15s and have no problems. The speedo is off a little but no big deal. I also haven't noticed much power drop, on the plus size it runs about 300rmp lower on the interstate.
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Old 05-22-2009, 10:13 PM #8
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One of the easiest ways is to look up the revolutions per mile of the tires you have and the ones you want and do some calculations in your head.

A taller tire results in lower revs/mile, so if you need to know the effect on your speedometer, just take the ratio from stock to what you are buying and apply that to the speedometer reading.
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Old 05-23-2009, 01:07 PM #9
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So...

I have a question.

I have a base 4Runner. It originally had 225/75-15 but I switched to 265/70-16.

How much do you think my odo/speedo would change with 265/75-16?
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Old 05-23-2009, 01:34 PM #10
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use this link

http://www.miata.net/garage/tirecalc.html
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Old 05-23-2009, 01:44 PM #11
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Quote:
Originally posted by ChildrenOfBodom
So...

I have a question.

I have a base 4Runner. It originally had 225/75-15 but I switched to 265/70-16.

How much do you think my odo/speedo would change with 265/75-16?
Right now with 265/70/16 your off by about 8.2%. You would be going 65 when reading 60.

If you went up to 265/75/16 you would be off by about 11.9%. That would mean going 67 when reading 60.
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Old 05-23-2009, 05:05 PM #12
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You could get a speedo correction box.
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Old 05-23-2009, 05:40 PM #13
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You could drive around with a GPS for a couple of days and learn a few key speeds. Once you know 28 is really 30 and 56 is really 60 and maybe one or two others it's easy...
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