245/60/15's Rub! - Team Camaro Tech
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post #1 of 10 (permalink) Old Dec 11th, 10, 02:33 PM Thread Starter
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Gary
 
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245/60/15's Rub!

Guys...I have 245/60/15's all the way around the car and the fronts are rubbing when I go over a bump. Not sure of the back spacing though. Just for kicks, without taking off a rim, I stuck a ruler till it bottomed out and got a 4" measurement. Not sure if the ruler was bottoming out in the right spot though. The car has the Hotchkis 2" lowering springs. Do you think 235's will solve the problem? Also, I did install the buttonhead fender bolts and that did help a bit. Thanks!

Gary

Last edited by Gar's67; Dec 24th, 12 at 12:10 PM.
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post #2 of 10 (permalink) Old Dec 11th, 10, 05:08 PM
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Re: 245/60/15's Rub!

Looks like your wheels are 15 x 7 with 3-3/4" BS. With a 2" drop a 225/60 x 15 tire might be better suited. My '68 Camaro has TQ Thrust "D"'s 15 x 7 with 3-3/4" BS and the BFG T/A's 225/60 don't rub. I installed Hotchkis 1-1/2" drop rear springs and CPP 1-1/2" drop frt coils. There is no rubbing when the car goes air born or over speed bumps. Also installed CPP's front disc brakes which widens the track 1/2".
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post #3 of 10 (permalink) Old Dec 12th, 10, 05:53 AM
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Re: 245/60/15's Rub!

Airborne?? Sweet....

I'm running 235\60\15's with 4" backspace, 2" drop in front and they don't rub at all... front or back. That's with drums on the rear and off-the-shelf disc brakes in front.
But my wheels may be 15x6... can't remember. The quarters and fender lips are 1/2" below the tops of the tires.

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post #4 of 10 (permalink) Old Dec 12th, 10, 06:55 AM
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Re: 245/60/15's Rub!

Gary...

Cars with a disk brake setup will rub because it brings the wheel out about a half and inch or so. With that in mind, the rim with more backspace will bring the tire in further thus preventing the "rub" I have disk brakes with 15" 4 1/2 backspace rims and 225-60-15 tires and then rub slightly on the fender lip. I and going to drop to either 215 or 205 tires to end the slight rubbing. For me, its only on hard turns or hard bumps. Best bet is to go to a used tire store or a junk yard and get a 205 and 215 tire and have them mounted on your front rims and drive a bit to see what is best. Oh yea...forgot to say that I run 15x8 rims......all the way around.

Kev
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post #5 of 10 (permalink) Old Dec 12th, 10, 09:45 AM Thread Starter
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Gary
 
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Re: 245/60/15's Rub!

Great input...thanks. Later today I will take off a rim and measure the backspacing just to be sure. Also, I'm pretty sure I have 15 X 8's all the way around along with a disc set-up. The fender lip area has been "rolled" too. I let you know what I find out.

Gary
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post #6 of 10 (permalink) Old Dec 12th, 10, 01:24 PM Thread Starter
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Re: 245/60/15's Rub!

It looks like a 4 1/4" backspace. I think I measured it correctly using a link posted by DJD (thanks). I used the edge of a tape measurer and layed it across the outer most lip if the rim....careful not to have it touch the tire and than just measured the distance with a ruler. What tire size do you guys think I should try? Or, what about those spacers that fit under the coil spring? Thanks!

Gary
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post #7 of 10 (permalink) Old Dec 12th, 10, 03:17 PM Thread Starter
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Gary
 
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Re: 245/60/15's Rub!

These have to be 15 X 7 rims not 15 X 8.
I like the additional clearence that a 225/60/15 would have over the 245's. But is it necessary? Wouldn't a 235 look better?
245/60/15: 26.6" OD
235/60/15: 26.1" OD
225/60/15: 25.6" OD

The above OD's are for Radial TA's

Gary
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post #8 of 10 (permalink) Old Dec 13th, 10, 04:24 AM
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Rick
 
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Re: 245/60/15's Rub!

What are your alignment specs? Some negative camber may help.

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post #9 of 10 (permalink) Old Dec 18th, 10, 01:11 PM Thread Starter
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Gary
 
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Re: 245/60/15's Rub!

Not sure on the alignment specs. It goes nice and straight down the road! I remember bringing the Pozzi recommended specs to the shop though.

Any thoughts on coil-spring spacers? Would a 1/2" spacer really raise the front by 1 inch? My car does sag a bit more on the drivers side too so would I really want to do the same size spacer on both sides? It's rubbing on both sides. Or how about tire size....I could go with 225's and put a small spacer on the drivers side just to level the car. Thanks

Gary
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post #10 of 10 (permalink) Old Dec 20th, 10, 05:42 AM
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Bruce
 
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Re: 245/60/15's Rub!

I have 225-60-15 on the front and 245-60-15 on the rear using 8" Vette rallly wheels and have no rubbing issues on my SS Vert. It is a SB car with BB front springs and the front top of the tire is about 1" from the top wheel well.
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