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-   Suspension, Brakes , Wheels & Tires Tech (https://www.revscene.net/forums/suspension-brakes-wheels-tires-tech_191/)
-   -   How to adjust the Speedo after changing Rims/Tires? (https://www.revscene.net/forums/565107-how-adjust-speedo-after-changing-rims-tires.html)

cococly 02-17-2009 09:52 PM
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?

sil_fourty 02-17-2009 11:14 PM
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!:thumbsup:

Leopold Stotch 02-17-2009 11:20 PM
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?

cococly 02-17-2009 11:58 PM
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..

SORA'T 02-18-2009 03:02 PM
you can use 215/45/17 or 225/45/17, and it will be much closer, what car is it?


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