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What size slicks fit FB?

Old 02-01-06, 09:09 PM
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What size slicks fit FB?

Ok so I'm getting some mixed info on what size slicks fit on FB's

some say 26x8 is the biggest
most say 28x9
one said 28x10.5

I have a stock GSL-SE diff with the 4x114.3 (close to 4.5") bolt pattern, according to grannysspeedshop.com 15x8 with 5.5" backspace will fit a 28x9" slick, can anyone confirm or deny this "fact"?

Other then Weld Racing, i'm having a hard time finding a 15x8 with 5.5" bs


on another note; according to the weld website, 5.5 bs on an 8" wheel yields a 25mm offset

I understand offset to be the measurement from the center of the wheel to the back of the mounting flange

I understand backspacing to be the measurement from the ouside edge of the wheel lip to the back of the mounting flange

with an 8" wheel the center of the wheel is at 4" plus 25mm offset (1") that totals 5", so where does the extra half inch of backspace come from?
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Old 02-02-06, 10:44 AM
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5.5" back space is too much - it will rub the inner fender no matter what width tire you have.

4.5" back space is the most that will clear the inner fender with small diameter tires. I don't know with the large dia drag tire.

Getting your rim/tire choice to clear the outer fender is a whole nother problem. I am not a drag racer, so I don't know for sure. This board is for mostly road racing and autocross chassis questions.
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Old 02-02-06, 02:55 PM
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i currently have a 17x7 with a 5.1" bs (40mm offset) and there is more then .4" clearance from the tire/wheel to the fender, and that's with a taller 17" wheel

as you can see in this pic


Last edited by Phiber Optik; 02-02-06 at 02:57 PM.
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Old 02-05-06, 10:31 PM
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0.4" clearance is pretty tight - that tight will usually rub when the body rolls under race conditions.
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Old 02-21-06, 05:59 AM
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i need to no too i want to put some on my se rims
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Old 02-26-06, 04:44 PM
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in the next few weeks i will be buying weld 15x8 5.5" bs wheels for 26x8.5x15" et drags, i'll let you know how they fit
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Old 03-02-06, 01:59 AM
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I have 26 x 8.5 on a set of 15 x 7 inch rims. The rim offset is +38 (which is standard) on my 85 RX7. I had to roll the lip on the wheel arch but that was it, they fit like a glove.
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Old 03-02-06, 08:51 PM
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i use a set of 8x22 with a set of bogart 13 inch wheels
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