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78 maximum tire width?

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Old Jul 16, 2013 | 11:10 AM
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Default 78 maximum tire width?
Was thinking of putting 18" or 19" on rear and 18" on front...and possibly lowering the front an inch or so.
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Old Jul 16, 2013 | 11:38 AM
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When my car is complete I have and will be running 245/45/18 up front and 285/40/19 in rear. It can be done, some have run even wider out back, just have to be careful with backspacing.
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Old Jul 16, 2013 | 12:13 PM
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that should look fantastic! I think im keeping tire height same for front and back
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Old Jul 17, 2013 | 12:16 AM
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can anyone else chime in...greatly appreciate it
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Old Jul 17, 2013 | 08:20 AM
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I have 12's out back but I have extensive mods done. I dont see any way that you could put anymore than a 11" section width out back and have them sit right in the wheelwell with the stock IRS. Even with offset control arms.
If its been done I'll apologize in advance. My tires actually measure 11.6" at the widest point and are 28" tall.

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Old Jul 17, 2013 | 02:07 PM
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What size rims are those?
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Old Jul 17, 2013 | 02:31 PM
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Originally Posted by tektrans
I have 12's out back but I have extensive mods done. I dont see any way that you could put anymore than a 11" section width out back and have them sit right in the wheelwell with the stock IRS. Even with offset control arms.
If its been done I'll apologize in advance. My tires actually measure 11.6" at the widest point and are 28" tall.

That looks really good. What mods did you have to do? I will be going to a wider rear tire sooner or later. Don't think I'll need that much, but like the op, curious how wide you can stock and with offset trailing arms.
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Old Jul 17, 2013 | 02:33 PM
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Offset trailing arms do nothing for you at wheel sizes of 18 & 19. Might not even matter with 17. You only benefit with15 & 16" wheels.
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Old Jul 17, 2013 | 03:47 PM
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Originally Posted by Ibanez540r
When my car is complete I have and will be running 245/45/18 up front and 285/40/19 in rear. It can be done, some have run even wider out back, just have to be careful with backspacing.
what backspace and width are you planning?
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Old Jul 17, 2013 | 03:49 PM
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8.5 front 10 rear. Still haven't dialed in exact backspace yet (have to use custom spacers)
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Old Jul 17, 2013 | 03:57 PM
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Well I did the 4 link 9" conversion and I had to notch the frame rails so the tires would clear.
They are VS Work wheels. Ridiculously expensive but I got a killer deal on them.
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Old Jul 17, 2013 | 04:09 PM
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what is backspacing? does that mean I cant buy wheels and tires and just bolt them on? tia
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Old Jul 17, 2013 | 08:04 PM
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Originally Posted by psublett
what is backspacing? does that mean I cant buy wheels and tires and just bolt them on? tia
Not sure on BS I'd have to check but to be honest with my rear set up I wouldn't go off any specs of mine but to answer your question no you would not be able to just bolt on my wheel/tire combo and have it sit under the fender the way mine does because in order to clear the frame rails up front you would need to use a wheel spacer and they would stick out. Rims are 18x8 up front and 18x10 out back fwiw
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Old Jul 18, 2013 | 09:56 PM
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Originally Posted by psublett
what is backspacing? does that mean I cant buy wheels and tires and just bolt them on? tia
is googling stuff harder than posting questions?

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Old Jul 19, 2013 | 12:14 AM
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Originally Posted by Ibanez540r
Offset trailing arms do nothing for you at wheel sizes of 18 & 19. Might not even matter with 17. You only benefit with15 & 16" wheels.
I did not know that. Thanks for the info.
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Old Jul 19, 2013 | 09:53 AM
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thanks for your insight papa
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