15x8 Prostars w/ 5.5 backspacing needs spacers?
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Joined: Jul 1999
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From: Houston
15x8 Prostars w/ 5.5 backspacing needs spacers?
I just put them on and it looks like I needed to put spacers on, so I did. I don't recall ever reading this was needed. Does this sound right? Just want to make sure my wheels don't fly off while racing! 
Joined: Aug 2006
Posts: 12,812
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: 15x8 Prostars w/ 5.5 backspacing needs spacers?
why do you need spacers? if they are touching the body, clearance the body. some hammering is very normal.
FWIW, 8" wheels are generall 4.5" of BS
FWIW, 8" wheels are generall 4.5" of BS
Thread Starter
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Joined: Jul 1999
Posts: 792
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From: Houston
Re: 15x8 Prostars w/ 5.5 backspacing needs spacers?
I think it was the tip of the inner wheel well that was touching it. It is fine with the spacer, but it didn't feel fine w/out it.
Joined: Sep 2003
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 15x8 Prostars w/ 5.5 backspacing needs spacers?
Yep, most 8" wheels are 4.5 on thirdgens. I run 5.5" backspacing on my 15x8's but I run a 4th gen rear thats wider by 1.75" or so each side.
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