Quick wheel help please...

[astronut1885]

Hey guys. I need a quick bit of help. I am currently running 17x9 ROH Snypers on my car with 245/45/17 tires on them. My tires are pretty dead, and the rims have seen better days, so rather than buy new tires for around 800.00, I'm set up to score a brand new set of rims from a local ford dealership. I'm getting 18x8.5 2006 GT optional Bullit style wheels with 235/50/18 Pirelli tires mounted and balanced for 750.00. Right now, my current wheels clear the fenders with little room to spare, and with the occasional rub in the back on a big bump. I just wanted to know what the relative size difference will be between the two wheel/tire setups. I know the new ones will be slightly narrower, but height wise, will they be the same? If anyone is good at figuring this crap out, I'd appreciate it.
Thanks,
Rob

 

[89streetbeast]

the 18's will be about an 1 1/2" taller than the 17's

heres a nifty calculator http://www.wheelsmaster.com/rt_specs.jsp

 

[astronut1885]

Thanks dude. Looks like with the slightly narrower tire, I'll be all set, and I can afford to gain .75" on each side of the hub. Can't wait to get the new rims on my beast...

 

[1SLO306]

I wont think u will be able to run 235/50/18 on ur car. u would have to go with a 40 or 45. i would check ebay. they have awesome deals on there sometimes

 

[astronut1885]

with the 50 ratio, the total tire and wheel height increases by 1.5". That's .75" further from the hub on one side. I can afford to fit that. I'm also loosing .3" of footprint. That's gonna help too. It's really a negligable difference, since height gains can be split in half for fender clearance.

 

[astronut1885]

these are the actual rims...

 

[astronut1885]

the treadwear...

 

[1SLO306]

have u tried to fit them yet. i would do that and make sure the backspacing is close to the same if not and u buy them that would suck

 

[astronut1885]

the guy is giving me a 2 day return for fitment issues. I'll be bolting them up as soon as I get them back in my dad's f350 dually...

 

[1SLO306]

thats cool hope they fit good for ya!