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cj
Dodge Dakota
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3/12/2005
14:38:59

Subject: Speedo and Odometer reading
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I got a weird question, but after i got bigger tires (29 inch diameter to 31 inchers) My speedo is off by 5 percent or so, which i knew would occur, but i dont really mind. However, I was wondering if putting bigger tires than w/ the stock tires were affected the Odometer reading of how many miles drivin? If so, i might want to recalibrate it.



GB2000
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3/12/2005
14:56:52

RE: Speedo and Odometer reading
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I was told it would...which makes perfect sense if you think about it. I wouldn't recalibrate it though. It makes your vehicle look like it has less miles so it's a plus. Although it also throws your trip off as well...which sucks when you're going on long trips or trying to calculate your gas mileage as good as you can.




Josh Blackshire - Owner, Ohio Dakotas .NET
Red 98 Dakota Sport - Check it out!

cj
Dodge Dakota
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3/12/2005
19:43:54

RE: Speedo and Odometer reading
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Haha yeah GB2000 that's actually what I was thinking (About less mileage than actually is). But incase it doesnt i'd still like to know. Thanks GB



furball69
Dodge Dakota
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3/13/2005
12:02:53

RE: Speedo and Odometer reading
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Yes it does affect your odometer and how many miles driven. Basically, the speedo gear counts the rotations of the tires then adds up the distance travelled per rotation and now your tires go further on each rotation. The bigger tires are going 6.28 inches gurther per rotation. Doesn't seem like like much but for every 14,500 miles on the odo, your truck will have travelled an extra 1000 miles more, almost 7%.



93superdak
Dodge Dakota
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3/13/2005
13:16:45

RE: Speedo and Odometer reading
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I recently installed 4.10 ring and pinion. I have taller than stock tires. My speedo is way off and my mileage is now 1.2 miles for every "real" mile I go. Apparently my odometer isnt calibrated to tire rotation. Where is the Gen ll odometer calibrated from?



GB2000
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3/14/2005
07:54:08

RE: Speedo and Odometer reading
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furball69...1,000 miles MORE? I think you got that backwards...bigger tires = less rotations = less distance.

Josh




Josh Blackshire - Owner, Ohio Dakotas .NET
Red 98 Dakota Sport - Check it out!

daddio
Dodge Dakota
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3/14/2005
12:03:25

RE: Speedo and Odometer reading
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josh, think about it. less rotations( because it's bigger) in the same distance.



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