17" backspace verification - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 19 (permalink) Old Oct 12th, 03, 04:52 PM Thread Starter
 
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I have searched and read 90% of past posts on backspace, but want to make sure with my application.

I am going to run Qa1 coilovers in the front on my 67 with a lower than 2" lowered stance, maybe 2 1/2" so will the 17x8 with 5" backspace still work up front with 245/40/17's? Could I get away with 4 1/2 " backspace, negating me to custom order?

Out back will be lowered 3" and will be running disc brakes also, will 17x9.5 with 5 1/2 backspace 275/40/17 work without rubbing much? Or can I get away with 5", again negating having to custom order?

Or would you guys recommend a different size?
I will be running the 17" billet rallets.
Thanks
Jerry
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post #2 of 19 (permalink) Old Oct 12th, 03, 05:07 PM
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17x8 with 4.5" BS will work in the front but it will rub some as compared to 5.5" bs which is optimal IMO. For the rear, 17x9.5 with 5.5" bs will work fine. -chris
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post #3 of 19 (permalink) Old Oct 12th, 03, 06:01 PM Thread Starter
 
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so a 5 1/2" bs in the front will work huh? So basically 5 1/2" front and rear, I always thought it was a little staggered.
Thanks
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post #4 of 19 (permalink) Old Oct 12th, 03, 06:14 PM
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5.5" BS is optimal for the front? All I have ever seen says that 5" is optimal BS for the fronts on an 8" wide rim.

1967 RS Coupe (clone): 406 SBC, Thorley headers, Muncie, Hotchkis suspension, Centerline Matrix 17" wheels with Nitto 555's, Baer brakes, 12 bolt 3.73 posi, RS conversion, Vintage Air, PPG Hot Red. (SOLD)

1968 RS Coupe: Project...Mini-tubbed, Cammed LS 6.0, T56, 12 bolt 3.73 posi, Ridetech 4 link...slowly adding more...
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post #5 of 19 (permalink) Old Oct 12th, 03, 07:00 PM
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I don't think you want 5.5" on the front; that'll rub pretty bad on the inside. I know most people complain about 5.25" also which is why I always recommend 4.75" to 5" on a 17X8" front wheel. The 5.5" b.s. is fine for the rear.

Jody


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post #6 of 19 (permalink) Old Oct 13th, 03, 11:47 AM
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OOOOPS...I meant 17x8's with 5" BS is optimal...thats what the BS I just ordered for myself(18x8 wheel) and would go with a 17x9.5 wheel with 5.5" for the rear. [img]graemlins/clonk.gif[/img] -Chris
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post #7 of 19 (permalink) Old Oct 14th, 03, 09:19 AM
 
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I'm one of those guys that only wants to carry one spare. So what you guys are saying is that with a 17x8 wheel 5" backspacing would clear front and rear?

1967 Camaro SS<br />A work in progress...
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post #8 of 19 (permalink) Old Oct 14th, 03, 10:41 AM Thread Starter
 
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5.5" bs for rear disc cars too?
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post #9 of 19 (permalink) Old Oct 14th, 03, 12:33 PM
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Someone else told me they're using 4-3/4" b.s. with 17x8's and 245/45's. I'm leaning towards that route.

'67 RS Coupe - Gold on Gold, 327/210, PG and mostly original
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post #10 of 19 (permalink) Old Oct 14th, 03, 04:34 PM
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sherr 20, I have that combination on my 67 and I was limited to how low i could drop my car without rubbing. Although those sizes will work on a 69 they will limit how low you drop your 67 car. If ride height is important to you, i would go with a 17 x9 with a 255 45 17 in the rear and up front with a 17 x8 with a smaller tire or even a 17 x 7. All cars are different but i recently posted and not one 67 confirmed this combination to work without modification. [img]graemlins/beers.gif[/img]
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post #11 of 19 (permalink) Old Oct 15th, 03, 03:03 AM Thread Starter
 
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67RSRAG, 17x9 with 5.5 bs?
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post #12 of 19 (permalink) Old Oct 15th, 03, 04:38 PM
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correct. This will give you more clearance on the outside fender. Keep in mind it's better to error on the inside because you can always add a spacer to push it out but you can never bring it in. I'll send you some pics of my car so you can see what I'm talking about. [img]graemlins/beers.gif[/img]
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post #13 of 19 (permalink) Old Oct 17th, 03, 07:21 AM
 
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67 RS RAG,
what suspension are you set up with?
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post #14 of 19 (permalink) Old Oct 17th, 03, 07:43 AM
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If I ran a 4.5" BC 17x8 on the front, where's it going to rub? On the fender lip? Just wondering, as I have a set of these wheels looking for a car....
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post #15 of 19 (permalink) Old Oct 17th, 03, 07:44 AM
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Jerry, on my '68 I'm running 17X7, 4.5 back on front and 17X8, 4.75 back on the rear. My car has all Hotchkis lowered suspension (2" front, 1.5" rear). I am running 235/45s in front and 255/45s out back. All tires are just inside of each fender lip- a perfect fit IMO.

If you drop the front end too much you will have problems rubbing the upper inner fender surface under full compression. You could try measuring an ultra low profile tire (35-40 series) and calculate how low you can go & still clear.


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