C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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torque thrusts for 68 vette

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Old Aug 10, 2019 | 03:35 PM
  #21  
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Stock 15x8 Ralley Wheel backspace is 4.25”.
The wheels that are bolted to the car in your picture are 15x8. I am aware that stock is 15x7 but those are not 7” wide wheels on that car in the picture.
Just get a 15x8 Torq Thrust with a 4.25 backspace.
No spacers or anything else needed.
Bolt them on and go.

Jebby
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Old Aug 10, 2019 | 03:48 PM
  #22  
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Gjjohnson , gave the perfect answer since i had my spacers custom made by SSC over here in Germany. The dimensions for the hub needed for this specific rim you can get of the American Racing webside. I had ordered my rims from Summit Racing
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Old Aug 10, 2019 | 04:20 PM
  #23  
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Originally Posted by Jebbysan
Stock 15x8 Ralley Wheel backspace is 4.25”.
The wheels that are bolted to the car in your picture are 15x8. I am aware that stock is 15x7 but those are not 7” wide wheels on that car in the picture.
Just get a 15x8 Torq Thrust with a 4.25 backspace.
No spacers or anything else needed.
Bolt them on and go.

Jebby
They dont make 15x8 only 15x8.5 w/ 3.81 BS
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Old Aug 10, 2019 | 04:51 PM
  #24  
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Originally Posted by gjohnson
They dont make 15x8 only 15x8.5 w/ 3.81 BS
So the extra .5 is the difference in backspace as well.
It should bolt right on....the extra .5 will be on the inside. Why, exactly, are spacers needed?

Jebby
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Old Aug 10, 2019 | 05:38 PM
  #25  
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Originally Posted by Jebbysan
So the extra .5 is the difference in backspace as well.
It should bolt right on....the extra .5 will be on the inside. Why, exactly, are spacers needed?

Jebby
The.5 is on the outside plus this design was made for drum brakes w/deep spokes.These wheels will not clear calipers w/o spacers.

Last edited by gjohnson; Aug 10, 2019 at 05:38 PM.
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Old Aug 10, 2019 | 05:41 PM
  #26  
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Originally Posted by gjohnson
The.5 is on the outside plus this design was made for drum brakes w/deep spokes.These wheels will not clear calipers w/o spacers.
Good to know....thanks for clearing that up.

Jebby
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