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Old 10-28-2007, 05:33 PM   #1
harrdawg54
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how to adjust for taller tires

Right now I have 245/75/16 on my truck and I am getting some 33's. I was wondering how I adjust my spedo for the change.
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Old 10-28-2007, 06:07 PM   #2
Tx Firefighter
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Re: how to adjust for taller tires

Change the plastic speedo gears in the tailhousing of the trans.
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Old 10-28-2007, 07:33 PM   #3
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Re: how to adjust for taller tires

/\bingo!!
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Old 10-28-2007, 08:15 PM   #4
69GMCor70Chevy
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Re: how to adjust for taller tires

Have a look at this link. It should help you in your search for the correct gears.

http://www.tciauto.com/Products/Tech..._gears.asp#350
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Last edited by 69GMCor70Chevy; 10-28-2007 at 08:16 PM.
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Old 10-28-2007, 08:18 PM   #5
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Re: how to adjust for taller tires

And if you need to know how much of a change, here's a couple sites:

http://www.miata.net/garage/tirecalc.html

http://www.discounttire.com/dtcs/infoTireMath.dos
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Old 10-29-2007, 12:26 AM   #6
harrdawg54
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Re: how to adjust for taller tires

thanks for all the great replies. This site is great.
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