15x8 & 15x10 best backspacing for 1968

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Old Apr 30, 2007 | 08:17 PM
  #1  
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Default 15x8 & 15x10 best backspacing for 1968

I am ordering new rims for the rear of my vehicle. I'm either going with 15x8's and have std choices of 3.75 or 4.75 backspacing or 15x10 w/ 4.00bs. Any suggestions on what bs to choose for stock suspension. Tire size will liely be 255/60-15 but may want to go 295/50-15's.

Thanx T
 
Old May 1, 2007 | 12:18 AM
  #2  
tommynos's Avatar
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Default RE: 15x8 & 15x10 best backspacing for 1968

ORIGINAL: TSTONE

I am ordering new rims for the rear of my vehicle. I'm either going with 15x8's and have std choices of 3.75 or 4.75 backspacing or 15x10 w/ 4.00bs. Any suggestions on what bs to choose for stock suspension. Tire size will liely be 255/60-15 but may want to go 295/50-15's.

Thanx T
i just went threw this with my 68 and i went with the convo pros and i cant remember what size back space i put,but it had the 8-1/2 with 3.75 back space and they stuck out a bit,so i ordered new ones with 4. something and put 29 inch tall tires and took off the wheel well molding and trimmed the lip and shaved the trim and re-attached it,i added some very small spacers to help with the back space,as it was close to my mandwel 3 inch bend pipe...
so pretty much,i think,the 10 inch wide with 4 inch bs is going to stick out too much,heres a couple pics..

[IMG]local://upfiles/5088/EEA48489BE9E42709103AA7CE6A327F0.jpg[/IMG]

[IMG]local://upfiles/5088/176709E4C7B24A8694B9B0B926B94005.jpg[/IMG]
 
Old May 1, 2007 | 02:07 PM
  #3  
skar's Avatar
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Default RE: 15x8 & 15x10 best backspacing for 1968

Talk to Jerry at commerce twp discount tire. He seems to know his stuff or has ways to find out.
 
Old May 1, 2007 | 02:40 PM
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TSTONE's Avatar
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Default RE: 15x8 & 15x10 best backspacing for 1968

thanx - you wouldn't believe how much i've read today and learned about how to calc bs & offset
 
Old May 1, 2007 | 03:30 PM
  #5  
1969 SS's Avatar
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Default RE: 15x8 & 15x10 best backspacing for 1968

ten inch rims will not fit well at all

the biggest and safest route to go, is with a 16 x 8 all the way around with 4 1/2" of backspacing and a 245/50 tire. you should be able to get a 255/50 on the same rims in back. the only rubbing you should have with this combo is on a lock-to-lock turn in front

I have had 255/60/15 on 8" rims in back on some Camaros and they havent rubbed but then I have had 245/60/15 and they have rubbed. I have seen 275/60/15 fit on a few cars though.

it all depends on your rideheight and you need to remember that all these cars are different because time has treated a lot better than others, so unless you actually take the time and have the knowhow to measure out both sides correctly, you are best off saving yourself some headaches and going with the safe choices
 
Old May 1, 2007 | 05:09 PM
  #6  
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Default RE: 15x8 & 15x10 best backspacing for 1968

at this point its looking like 15x8 3.75bs w/ 255/60-15 tires
 
Old May 3, 2007 | 03:44 PM
  #7  
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Default RE: 15x8 & 15x10 best backspacing for 1968

you want more backspacing than that or your tires will be sticking out too far. 4 1/2" would be much better for you.
 
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