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Go Back   REVscene Automotive Forum > Technical Discussion > Suspension, Brakes , Wheels & Tires Tech

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Old 02-17-2009, 09:52 PM   #1
WOAH! i think Vtec just kicked in!
 
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How to adjust the Speedo after changing Rims/Tires?

I have used the Tire Size Calculator
http://www.1010tires.com/TireSizeCalculator.asp

and it shows that my speedo might show around 5% faster than the actual speed.

Is there a way to adjust that? or if anyone is bothered about this issue? Techincally, my milage would be higher than it otherwise would?
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Old 02-17-2009, 11:14 PM   #2
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Just leave it....unless you're running a A/M digital speedo with correction capabilities (which I assume you're not) then you're pretty SOL on this one. Pay to play, live with it!
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Old 02-17-2009, 11:20 PM   #3
OMGWTFBBQ is a common word I say everyday
 
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That tire calculator isn't that great, wasn't even close when comparing my wheels.

also doesn't account for stretched tires.

edit: why are you going with a smaller circumference anyhow?
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Old 02-17-2009, 11:58 PM   #4
WOAH! i think Vtec just kicked in!
 
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I was using 205/50R17.

And planning to get 215/40R17..

I can see that it's a 3.3cm drop of the wheel height..
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Old 02-18-2009, 03:02 PM   #5
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you can use 215/45/17 or 225/45/17, and it will be much closer, what car is it?
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