Tire Question

sonicblue03vert

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Ok, so, I just picked up my 03 GT Convertible, and the wheels are aftermarket. The rears have 245/45/18s on them, now I know my speedo will be off, but I am getting an SCT tuner to fix that very soon. My main concern is the front. The fronts have 215/55/18s on them. Will I have any issues with that? I am not autocrossing or racing, just cruising around during the summers, and the tires have lots of life, so I don't want to get rid of them. Any input is much appreciated.
 

trebor3170

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Seems kinda small, but, if they're not too stretched on the rim, and the load rating is adequate, you should be ok.
 

RAU03MACH

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To me it seems to small
?
How is the alignment
Is it a low profile tire
Just depends
 

07GtS197

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If you have abs the difference in tire diameter may set off abs thinking theres wheel spin. And its a little odd that the fronts are taller than the rears.


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sonicblue03vert

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Yes, it is odd. But, the tires are not stretched In anyway, just a skinnier aftermarket front wheel. and the alignment is dead on, because I got it aligned when I replaced ball joints. Just thought it was odd tire choice on front. but, if it wont affect anything much, I'll roll with it until I need new tires and address then
 

RAU03MACH

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Are your tires off set
A picture might help just to see how it looks
I never heard of that combination or set up
Just wondering
 
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sonicblue03vert

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Like I said, doesn't look too bad. I may wear these 55s out, and go to 45 or 40s when they need to be replaced.
 

95opal

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Never saw anyone run a taller front tire than rear but hey not my car.
215/55-18 245/45-18 Difference
Diameter inches (mm)
27.31 (693.7) 26.68 (677.7)
 
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sonicblue03vert

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Yea, I just bought the car, and the person who owned it before me hacked this poor thing together, so I'm just fixing a lot. I'll just put it this way, when i bought it, rear brakes were so bad, the pistons from the calipers were pressing directly on the rotors!

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RAU03MACH

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Sounds like you have your work cut for you
As you make changes or up grade send in those pictures
Not a bad project car
Have fun with it
 
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sonicblue03vert

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Ok, so I've decided to ditch the wheels, and go with 10 inch wide in the back, and nines in the front. I know the front will be fine, but, will I need to roll my fenders or anything for the rear?

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evilcw311

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Depends on the size of the tires and how low your dropped.


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evilcw311

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If not dropped then you’ll be fine. But if you decide to drop you’ll need a heat gun and either a Louisville slugger or Eastlake fender roller.


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joe65

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there's a nifty website i use all the time. not saying you don't have this figured out but there's a comparison tool on there that i use a lot when shopping for tires.
https://tiresize.com/calculator/
 

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