So, time for new tires. Thinking about going a little bigger. From 235/50/18 to 255/45/18. Will this affect ride quality? and how does it affect speedometer readings??

 

None and none. This change will be plug and play. But it will look a little nicer.

 

That's actually a pretty good match. Your speedometer will be off by 0.4 MPH higher than it is now, assuming the tire specs are the same from brand to brand. Use this: http://www.1010tires.com/tiresizecalculator.asp

More importantly, what is the width of the wheels are on your car? Most tire manufacturers recommend 8.5" min for 255's, if I recall. An 8" width can take a 245/.

 

If you go with a quality summer tire at 255/45/18, you will have the same ride quality basically, but better grip in 65 degrees and up. I loved my Goodyear F1 Eagle D-3's summer tires on my stock 64W bullit rims. Worth the upgrade. Erik

 

I myself have some 255/45/18's (goodyear eagle f1s) and I gotta say I really couldn't tell the difference. I'd say go for it!

 

Yeah...I thought it would give it a little better look!

 

not sure of the stock 18" rim. Need to check. So I'm looking at either a 255 or 245...Either one should look pretty good I hope!

 

Thinking about going with this BF Goodrich...

http://www.tirerack.com/tires/tires....oModel=Mustang GT&autoModClar=Coupe&partnum=545YR8GFTAKDW2&tab=Si zes

I like the GS-D3s, aren't the discontinued though?

 

did they fit on your stock rim?

 

I just bought these last week:

http://www.tirerack.com/tires/tires....omCompare1=yes

will be having them installed next week, same chrome 18" x 8.5 bullit wheels.