Supp guys,

I just bought a set of 19" rims and comes with 245/35 tires. Do you guys know how much this will throw off my speedometer? and where do I go to get that re-adjusted?

 

i think its adjustable in a tuner/programmer. might have to have ford do it if you dont have one.

 

Really ?? If you get bigger rims you have to get your speedometer adjusted ??
no way....

 

No. If you go bigger diameter you have to get speedo adjusted. You can get bigger rims (which can come with skinnier tread) and still have the same ride heigth.

 

true.....like the stock 16" vs. the pp 17" or gt 17". diff rim size but same outside diameter. should have clarified that earlier.

 

It may not be a good idea to use those tires. It is recommended that you stay within 3% of tire height difference when swapping sizes for proper tire description and load range . This combo would be 4.6 %. It would be better if you had 245s instead . Also your speedo will be off about 3 mph with the 235s. at 60 mph

 

Try this calculator. It works great for determining difference between sizes and figuring out rotations per mile for Xcal adjustments....

http://www.miata.net/garage/tirecalc.html

Luck!

 

great post billy, my winter tires are smaller, that works perfect

 

http://www.1010tires.com/TireSizeCalculator.asp

This is another good tire comparing calculator.

 

I think we are missing the most imoortant part of this guys post. He actually has a MOMO steering wheel installed in his stang! I know I know to each his own, but my god. HaHa