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My gf purchased an 1999 anniversary edition pony convertible. Unfortunately it came with aftermarket tires & rims. The fronts are 245/45R17 & the rears are 285/40R17. Not only are they different sizes but they're also different brands, tread patterns & speed ratings, which I'm told is a big no no. These tires need to be replaced for state inspection so I have a good excuse to get all matching brand, model & speed rating tires for this car. I have a few questions regarding what these rims will allow for? Can I get away with substituting 255/45R17 for the 285/40R17 that are currently on the rear? Likewise would changing the fronts to a 275/40R17 from the current 245/45R17 be possible without changing the current rims? Also what psi should these tires be set at? Thank you in advance for your help.
Do you know the width of the rims? I'm guessing by the tire sizes that the back rims are wider.
Unfortunately I don't. I haven't been able to find any markings in plan view but I haven't taken any of the rims off of the car. They have the mustang emblem in the center & I've heard a couple of people refer to them as cobra rims but I don't know anything more than that.
Last edited by The Sheriff; Jun 14, 2017 at 03:59 PM.
Reason: Amendment
I know this is an old post but I have the same inquiry
I got an 07 mustang and I want to put 19in rims on it and I need the close to perfect tire size New Rim size
I'm the OP of the thread referenced by @05stangkc . I own a 2013 GT CS. If it would help I can take some pictures of the rims mounted to give you an idea of how it looks; but as you know, the 2013 is a little different than yours.
