C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Wheel and tire purchase goof up on my part...need input

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Old Nov 15, 2019 | 02:55 PM
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C230k, W210
Wheel and tire purchase goof up on my part...need input

Car in question: 2003 c230 Coupe

Purchased a set of 2005 Sport wheels from a local pick a part with tires. 225-45-17 up front and 245-40-17 rears. Put them on the car, drove around...much better ride. A lot smoother than the 16s I had. One wheel/tire just looked off to me...now I see what the issue is. The 2 rear wheels are different widths. One is a 7.5 and one is a 8.5, so the oddity I saw was that one of the rear tires is a little more stretched. UGH!!!

Is this a big deal until I can source another 17x8.5 wheel? Of if I find a 7.5 first, is running the 2 different tire sizes on front and back a big deal sine they are no longer staggered?

Thanks for the input!
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Old Nov 15, 2019 | 06:56 PM
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Did you check the fronts to make sure one of the 225/45/17s isn’t installed on the missing 8.5?

It seems like an obvious mistake but you’d be surprised what happens in tire shops sometimes. I once had a brand name chain install tires with the rotation direction wrong.

i can’t tell you about the negative impact of running mixed width rims. It can’t be too bad though since many cars are only equipped with mini spares which would be a far greater difference. Are you talking days or months?
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Old Nov 15, 2019 | 09:39 PM
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Yeah I yanked them all off and checked...all 7.5. It will take until I find one. It’s the 5 spoke sport wheel.
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Old Nov 15, 2019 | 11:51 PM
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I'm lost. So the tires are 225/45/17 in the front (both) and 245/40/17 in the rear (both), but 3 of the rims are 7.5" with 1 rim being 8.5" wide?

As long as that 8.5" is in the rear, it'll be fine other than the goofy look which only you'll know since nobody looks at both sides of the car simultaneously. You can keep that configuration as long as you want. No real safety issues unless you have a lead foot.

You can either locate another 7.5" wheel which will allow you to rotate all 4 wheels, or locate a 8.5" wheel for a staggered setup. If going the latter route I would recommend non directional tires so at least you can rotate along the same axles.

Last edited by slammer111; Nov 15, 2019 at 11:54 PM.
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Old Nov 16, 2019 | 08:17 PM
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Originally Posted by slammer111
I'm lost. So the tires are 225/45/17 in the front (both) and 245/40/17 in the rear (both), but 3 of the rims are 7.5" with 1 rim being 8.5" wide?

As long as that 8.5" is in the rear, it'll be fine other than the goofy look which only you'll know since nobody looks at both sides of the car simultaneously. You can keep that configuration as long as you want. No real safety issues unless you have a lead foot.

You can either locate another 7.5" wheel which will allow you to rotate all 4 wheels, or locate a 8.5" wheel for a staggered setup. If going the latter route I would recommend non directional tires so at least you can rotate along the same axles.
That is the scenario and you have it correct. Kicking myself for this but got distracted when the guy brought the sport auto shift knob up for me to look at (still haven’t figured if that will work on the car) and I forgot to look at the last wheel. I am thinking of running the 8.5. I like the way the 7.5 looks with the 245 tire but it sits in a little further. Might get spacers either way to push out a little.
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