Changed Tire Size


  #1  
Old 10-31-05, 05:44 AM
SASSYSAID
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Changed Tire Size

I Went From A Size 15 Tire To A Size 17 On My Truck ,so Now If 'my Speedometer Says I'm Going 60 Mph What Would My Actual Speed Be With The Two Inch Difference In Tire Size?
 
  #2  
Old 11-01-05, 06:02 AM
M
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High tech - take it to a dealer that does speedometer calibration. They can either fix the speedo so it reads right or give you a printout of the various speeds.

Low tech - get on the interstate and gauge your odometer by the mile markers, a 10 mile run is best. If you travel 1 mile and your odometer reads .9 of a mile you know that your speedo is approx 10% off -50mph=55mph

Also just because your rims are 2" bigger doesn't mean the tire circumferrence is neccesarily bigger as you might have a lower profile tire.
 
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Old 11-01-05, 07:10 AM
S
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Medium Tech: Talk to someone in a tire shop and find out the diameter of both your old and new tires and we can do some math for you.
 
  #4  
Old 11-01-05, 07:13 PM
M
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Originally Posted by J.M.C.
Medium Tech: we can do some math for you.

I hope it not me that has to do the math
 
  #5  
Old 11-20-05, 08:52 AM
dabirdzR?T
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if you google, there are several tire size calculators on the web, you simply punch in the numbers of both tires, and it will tell you the difference of your speedo in a % to figure it out.
 
 

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