Will 20" rims fit on a 2004 impala?

Hey James, here's what you will be looking at
The 20's will fit but there will be a little tire scrub/rub on tight turns and moderate bumps. Also the 20's will make your car a little jittery on sterring seeing how the height ratio on the tire is low. One other consideration should be how many people are you carrying, just yourself or 2, 3 or 4? I'd get 18's as you will eliminate the clearance problem. If you go 20's you will need to raise the car about 2 inches

Hope this helps.

Will also throw your speedo off. Also found on another forum that it will cause some CV issues too.

JAMES THE PUNISHER said:

I am looking at a wheel/tire package the rims are 20x8.5 and the tire options are 245/35/20s or 255/35/20s. My question is which tire would be better to go with, and will there be any problems with rubbing/turning on either one.

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20's with 255/35 I have those in my 2000 and have no rubbing of any kind