gpdscott

Has anyone put wider tires on their Monte Carlo SS or Impala SS ?, and if so , what size ?

Corny40

iTrader: (7)

I've got 255/35/20's. Some have gone with 245/35/20's.

You could also go 255/45/18's or 245/45/18's.

Or 255/40/19's or 245/40/19's.

BuffaloSS

iTrader: (3)

The 255's are a closer match, speedo-wise. They're within .8% of the stock size yet provide a 3/4" wider footprint...which results in the speedo being off .4mph @ 60. The 245's are off by 2% (still within acceptable limits), and result in a 2.1mph difference at that speed.

HOWever, it's not recommended to put the 255 on the stock wheels, as they're designed to install on an 8"-9.5" wide wheel. The 245's can mount on a 7.5-9" wheel. IIRC, ours are 7.5"? Or are they just 7"? If it's the latter, going with the 245s would be a stretch (both literally and figuratively), and may cause the sidewalls to bubble outward a bit and look funny.

I guess someone who has done the 245's needs to speak up about how they've held up, as what I posted is just technical information with no real-world results.

gpdscott

Thanks guy's, is there a problem with them rubbing on the rear with that size tire's? and stock wheels?

Corny40

iTrader: (7)

With the 255s, sometimes yes. I had to roll my fenders. Some have not had to.