Hey guys if you were building your "ideal" road/street racer what would be the backspacing you would want on the front with a 17"x10" wheel And also an 18"X10" wheel? Also to go a little further what would the rear backspacing be for a 18"x12 and a 19"x12"? This is assuming you were going with a custom frame and could go with whatever size and backspacing you want. This is for a regularly driven street car if that helps any. Also please elaborate a little about your decisions please. Thanks in advance.
Well, ideally, you would want to have a 0 offset on both wheels. Keeping things centered puts less stress on bearings and such. Ask any mechanical engineer, they'll tell you the same.
This could quickly turn into a huge technical discussion on suspension. But, short story, since longer is better for suspension arms, you would end up with a big possitive offset on your front wheels to make your suspension design better. But for looks most do not like the high positive offset wheels and want some "lip" on the wheel.
Thanks Jon and Frank. I appreciate the reply. So as far as looks go(performance second hand) what would be the suggested backspacing that you would consider when you would be doing your own car. This has been my brickwall on ordering stuff and I know I am overthinking this I just dont want to be wrong this early in...LOL
Thanks again
It depends. I am assuming you are mini tub? So we usually do a 6 to 6.25 backspace. Although I did buy a dozen custom 19" outer rims shells to be able to do a 6" lip on Lisa's Project EmptyNest which is right at 5" backspace or so. Looks KILLER! On the front, a 8" rim with 4 3/4 backspace is usually good on stock track width and give a nice 2" lip. Again, though if you are designing the front suspension from scratch, you would want to make the arms as long as possible, changing you backspace. Brake caliper clearance also will be a dictator here.
If you would like to talk through this you are welcome to call
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Frank Serafine
Last edited by ProdigyCustoms; 12-30-2007 at 09:19 AM.
Frank I will call tomorrow if you are open. And yes front track width is whatever I want it to be so I just need to know what a decent backspacing would be. I need that info to order, I also have to account for brakes and what that would do to the width needed. Thanks again
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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Ideal front wheel backspacing for a GENI
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