Yet another front wheel question - Team Camaro Tech
Wheels & Tires What fits what?

 
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post #1 of 3 (permalink) Old Nov 18th, 18, 12:25 PM Thread Starter
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Steve
 
Join Date: Apr 2002
Location: Southeast Pa.
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Yet another front wheel question

My setup: stock subframe, DSE control arms, factory disc spindles, Wilwood brakes with hubs. My question is regarding backspacing. Tires will be either 235/45R17 or 245/45R17 on Billet Specialties 17x8 Mag Legend Series wheels. Ideally an 8 wheel sets up at +6mm offset. This is about 4.75 backspace on the nose. My Wilwood setup pushes the track out 3/8 so my ideal backspace should be 5 1/8 +/- or about +15 offset. Does that sound right? I twist myself up going back and forth between offset and backspace. The wheel is available out to 5 3/4 so i was thinking 5 1/4 and a 1/8 spacer if necessary. Am i messing my math up?

67RSSS......owned since 69. A basket case for most of it.
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post #2 of 3 (permalink) Old Nov 18th, 18, 05:07 PM
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Pete
 
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Re: Yet another front wheel question

I have 235/45R17s on +0 offset 17x9 rims and have clearance issues with my rear fenders. If you're running the same or wider, you really should go with wider rims as a 235 has almost 10" of tread. They were fine when the car sat 3 inches higher, but won't work at all with my car's current stance. I'm looking at +25 rims for mine as I want to move my rear tires inward about an inch. If your rotors move your wheels 3/8 inch out, I think that effectively makes a +6 rim (3 3/4" goes outside the mounting surface) effectively a -3 offset as the outside edge of the rim for a -3 would be in the same place. You'll need backspacing/positive offset to compensate. A +15 offset will compensate for the additional offset your new hubs create, but my guess is that you'll still be too close to the fenders with a 235 or 245 tire. I measured my 17x9s on the car to come up with my targets. I have 2 inches inside clearance with these rims right now, so adding 1 inch of offset (25mm) should put my tired dead center between the fender lip and inner fender. I recommend you measure to figure out where your wheels need to move (in or out).
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post #3 of 3 (permalink) Old Nov 18th, 18, 06:10 PM Thread Starter
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Steve
 
Join Date: Apr 2002
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Re: Yet another front wheel question

I dont have a rear issue. This is all front end.

67RSSS......owned since 69. A basket case for most of it.
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