can someone explain what needs to happen when u put larger wheels (rims and

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collegegirl

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tires) on a car? from 17's to 20's? I know it has something to do with larger tires taking longer to complete revolutions. Do the tire guys have to do something to the cars computer to make sure my speedometer reads correctly? Help me guys, I don't want the tire shop guys to try to take advantage of me. I need to have my facts straight. Chrysler 300 base. From 17's to 20's.
 
If your speedo is analog,A needle that moves around a dial then the computer wont help, you will need a new gear for your transmission. An easy fix IF they have that gear, call your local dealer.
The basic law of computing, GIGO, garbage in=garbage out
 
Doesn't exactly answer your question, but you will definitely want to upgrade your brakes. Now that you got those nice rims, you will want to be able to stop still.
 
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