Wheel dimension questions

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I am looking at a set of wheels, 18x9.5 +30mm, hub bore 72.6mm.

Will I need spacers?
Will they fit?

Nick

 

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Anybody?

Nick

 

[EB1STGN]

You'll need an adapter. By my calculations your backspacing for those wheels is going to be around 6.5". The normal tightest fit for the back is 5" most people use a 4.75" backspacing 18x9.5" wheel. I'm guessing you'll need a 1.75" adapter to mount those on the rear. On the fronts I'm not sure if they will fit but I'm sure you'll also need an adapter.

 

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Would I be better off going with a 18x8.5+30, hub bore 72.6mm, for the fronts?

Nick

 

[EB1STGN]

Would I be better off going with a 18x8.5+30, hub bore 72.6mm, for the fronts?

Nick

You could get away with th 8.5" up front but you'll need a backspacing in the range of 4.5. Is there a specific wheel you want? Positive offset is usually not used on these vehicles. Positive is less dish and negative is a deeper dish. You're problem is the +30 mm offset that is going to require an adapter on any wide rim. A +30mm on a 8.5" wheel is around 6" backspacing which is still going to require a 1.5" adapter but it will fit in there I believe.

 

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Here is the style of the wheel.

It is an agressive fitament wheel for rwd applications. I e-mailed the shop to see if it is negative or positive. I just assumed it was positive.

Thanks for the help.

Nick

 

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What size spacers will I need if I run 18x9.5 +12?

Nick

 

[EB1STGN]

1 inch to be on the safe side will give you 4.75" backspacing. The wheels will have a 5.75" backspace. Some have fit as much as a 5" backspace wheel but 4.75 is the sure way to go .

 

[GregInAtl]

1 inch to be on the safe side will give you 4.75" backspacing. The wheels will have a 5.75" backspace. Some have fit as much as a 5" backspace wheel but 4.75 is the sure way to go .

100% agreed, if you are lowered in the front w/ springs stay w/ "normal" BS, if you have drop spindles you need 1/2" more to get the tire off the outer lip. like 4.75" BS on an 8.5" front w/ a 2" spindle drop.

 

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This is my car's current set up
Hotchkis TVS
Front:
Hotchkis Tubular Upper Control Arms
Baer Track on F-Body spindles
Rear:
Baer Track discs
Baer Brake Systems | Performance you can See!
Hotchkis Sport Suspension - 78-88 A/G Body TVS System :: Total Vehicle Systems ::

Nick