330hp_91RS

I'm getting some cragar street stars for my ride 15x10. I am going to put a 28 inch tire in the rear and then lower the rear suspension about 1 inch.

I'll only roll the fender lip if i have to.

What backspacing should I run so that when I launch the tires won't rub on the outer fender???

If i have to bang the poop out of the inner fender, no biggie, but they need to fit well.

330hp_91RS

What do you think, 5.5 inches of BS, or
5.25
or
5.75??????

88IROC350TPI

I run 5.5" on a 15x8 rim. My 28x10.50's (more like 28x11.50's) didnt come close to rubbing anywhere except the lower front part of the wheel well. Some banging with a sledge hammer, some new undercoating, and its all good. My tire doesnt come anywhere close to touching the fender lip or anything.

nolanr0413

kandied is doin it. i think he has a 6.75 inch bs. with 10s

88IROC350TPI

6.75 sounds kinda scary to me especially if he plans on running a big tire. I have like 1.5" (or less) of clearance on the inside of my wheel wells so that may or may not work out too well depending on tire width.

They tuck under the car perfectly - they don't stick out past the fender at all.

330hp_91RS

I want to run a 15x10 though, not a 15x8. With a 275/60 tire.

I know you have 5.5 with the 15x8's, but what should I run with some 15x10's????

6.75 does sound a little much to me also.

330hp_91RS

I need to know quick here guys, I found a set of wheels, 15x10 and 15x7 with 6.5 inch backspacing in the rear.

I am going to bet that I need 5.5 inch backspacing. That is just a guess, but about 6 years ago i was going to buy some centerline 15x10's for the rear and I recollect asking for 5.75 inch backspacing.

I found a set of Draglites, cheap.

88IROC350TPI

They might work ...but I couldn't guaruntee it. I could tell you that for sure that 15x10's with 5.0 or 5.5" BS would work with 275/60's though with a 15x10 rim.

mw66nova

iTrader: (13)

any reason why you want to run a 15x10 so bad? other than you just want to, is there a real reason? my buddy is running 15x8 with a 315/60 drag radial tire on his wagon that runs low 9's in the quarter pullin' the wheels about 1 1/2 ft off the ground. there's proof that a 15x8 wheel works well.

330hp_91RS

What the heck did you just say??? I can't understand that sentence.

I think you tried to say that you know for sure that 15x8's will work with 5.0 or 5.5 inches of BS with the tires I want to run, but you are not sure about the 15x10's.

Is that what you were trying to say???

88IROC350TPI

hahaha thats what happens when you start typing, leave, come back 15 minutes later, and continue typing in a hurry

I know for sure 15x10 rims with 5" or 5.5" backspacing will work but you MIGHT have to slightly hammer out the lower/front of the wheelwell due to the height of the tire. However, 6.5" BS would be cutting it pretty close ...you might run into clearance problems that you can't fix with a sledge hammer... I've never seen anyone try it so I dont know - it might work, might not. Its up to you to decide if its worth the risk of buying them

Now lets see if that made sense

330hp_91RS

Thanks buddy, I got that one, loud and clear.

LOL

330hp_91RS

Lemme get this straight....

If I use 15x10's with 5.5 inches of backspacing, my wheels are going to stick out 2 inches farther than yours will.

By the looks of that pic you posted up there, the tire would rub on the fender lip. I want to lower the rear 1 inch to tuck the meats, but with 5.5 inches of B.S I don't see how I could do it.

It looks like with a 275/60 tire I could come out toward the fender lip maybe another 1/2-3/4 inch. That would mean that with a 10 inch wide wheel, I'd have to go with close to 7 inches of backspacing to get them to tuck.

NOW, did you roll the lip on you fender in the rear??? Cause If you did not, Then the 6.5 inches of BS should work perfect.

I jotted this all down on paper to figure it out.

BTW- I have all the necessary tools to massage the inner fender cause my family owns a body shop.

What do you think? Go with 6.5 on the BS???? I think I'll be running a tire with less tread and section width than you, so the rubbing should not be THAT bad. I hope.

88IROC350TPI

I did some further digging because what you said does make perfect sense, but once again, I've never seen it so I dunno.

15x10 with 5.5" BS and 28x12.50 slicks: https://www.thirdgen.org/techbb2/sho...hreadid=206990

More 15x10's ...these look like they stick out quite a bit compared to my friend Z28 who runs the same tire/wheel combo:
https://www.thirdgen.org/techbb2/sho...10+backspacing

Now these 2 cars look EXACTLY like my friends car does:
https://www.thirdgen.org/techbb2/sho...10+backspacing

330hp_91RS

Looks like 5.5 inches of backspacing is the way most guys go. It looks like if these cars were an inch lower in the rear that there would be rubbing issues on the outer fender lip.

I might go with 6 inches of backspacing and then put some 1/4 inch spacers on there, I think that might work.

I'd like to try 6 inches of backspacing and hammer the crap out of the inner fender. If they still don't fit, I can put the 1/4 inch spacers on there and they should fit.


Do you think that would be the way to go???

I don't think I can get the rims in 5.75 inches of BS anyway.

You think there is enough room for another 1/2 of BS??? I know there is enough for a 1/4 inch, but 1/2, I'm not sure, especially when I lower it.

88IROC350TPI

I'd say theres a 90% chance that'd work fine. The thing you have to worry about is hitting the "inside" of the wheel well above the bumpstop.. You can hit that section with a sledge hammer all you want and you'll never get enough clearance.

Like suggested above, why not go with a 15x8 or even 15x9? It'd tuck in better, overall look better, and you'd still be able to run huge tires.

330hp_91RS

I don't see how its going to make that big of a difference. If I am going to run a 275/60/15 on either wheel, it seems like they would rub either way.

Maybe I am wrong but it seems that would be the case.

With 275's on the 10 inch rim, the tread width is just about the width of the rim, so bulge should be minimal, meaning if the wheels fit, the tires should not rub.

Kandied91z

iTrader: (7)

well you asked for my advice and i looked everything over but your wanting to do something entirely different then what i'm doing. yes i'm running a 10" rim with 6.75" of backspacing but i'm also running a 26" tire with a 295/35/18 drag radial being the largest.....

i wanted my wheels to look stock, allow for lowering and be anything but out of place. that's a little more difficult with a "fat" tire like your wanting to do. you are wanting a low cruising look with a saturday night drag style tire and those two don't go together.

i had to do some slight hammering as well as cut off my bumpstops in order to run the 6.75 bs with the 10" wheel. it works really well for my application but i couldn't run a fat tire like you want or i would really need to minitub the setup to keep it all inside. however, that's not to say it couldn't be done....i have yet to see it though as most either minitub or go like above. for anyone attempting similar ideas as my own though it works very well. you can see the wheel placement on the last page of my cardomain site.

330hp_91RS

In reality, I'm not going to run a 'fatter' tire than you are, we are talking 275/60's like all the guys that posted above, but with a 2 inch wider wheel.

I think I can do it, but I don't want to lower the car that much, the front is going to stay totally stock in ride height.

The rear is going to be lowerd 1 inch just to compensate for the 28 inch tall tire. That is it.

I understand if you are trying to tell me that with a tire that will already be 1 inch closer to the inner fender will rub if I lower it. I just know it would look awesome if I could do it.

Matt

Kandied91z

iTrader: (7)

anything is possible if you want it to be...

aziroc

well how did the 28" tire work? i have cragar street stars 15x6 up front, 15x10 in the rear. i run a 26" MT and i had to roll the lip since my car is lowered 1 1/2 inchs. i didint think id have to roll it till 1 day at the track, went to check air pressure and saw the outer part of the tire had been "cut" off by the lip yea, needless to say i rolled the SOB right there.

330hp_91RS

So I called Summit today and they said that Cragar will custom make me a set of 15x10's with 6 inches of backspacing for $143 each. It'll take a month before I get them though.

Problem is shipping for 4 wheels is going to be $128 to Hawaii. So we are looking at $630 for the wheels and $500 for the tires.

I guess $1,130 is not THAT bad, but geez, if I didn't have to pay those kind of shipping charges, we would be talking $900.

I may just end up getting new front tires and keeping the 17 inch centerlines for a while.

My Dad just bought a 91 Z28 so he might want the centerlines and we may get the Cragars for my car.

Timz2882

iTrader: (1)

i got 15x10 weld prostar rims with 26x10x15 slicks on them and they dont stick past the fender lip and they have 5.5 backspacing.

this pic looks like it sticks past but its less then even with the fender lip

330hp_91RS

Yeah, but if those tires you have were 2 inches taller and your rear was lowered 1 inch, you would probably have some rubbing problems with that backspacing.

That's why I am going another 1/2 inch inward so I don't rub on the outer fender lip.

Kandied91z

iTrader: (7)

yeah that isn't bad, but it's outside the fender and not stock looking......similar what my old 10.5's looked like.