Why are my tires rubbing!? :(

[crossrocker]

So I can't quite figure out why the rear tires are rubbing. They rub when coasting, under hard cornering and on big bumps. I don't understand why because the tires are stock at 215/60r15 on all fours. I have the tire pressure set to correct standards with 29 psi in front and a 36 psi in rear.
I got the car (944S) about a month ago w/ 125 k miles. It had stock struts up front and kyb shocks in the bank that were at the end of their life. I bought a used koni yellow set and installed that on all four corners. Then I got an alignment done. I'm posting pictures of the wheel well as well as the alignment sheet.

Please tell me why my tires are rubbing! It's hard finding smaller side walled tires that are not for track use.
Thanks.



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[9FF]

If they rub while just coasting like you say, it's not the shocks. Looks like your alignment shop dialed in more camber at the back, that should help, but if it hasn't it's either:

1. Your torsion bars are worn (very unlikely)
2. Previous owner adjusted the height too low by reindexing the torsion bars (unlikely but possible)
3. Your spring plate bushes are worn (quite likely)
4. Your height adjuster on the spring plates are set at the low extreme (highly likely)

Likely cure: Check your ride height at the factory settings, lift the rear using the spring plate height adjuster bolts.

[DannoXYZ]

Problem is you have 15" early-offset (23.3mm) PhoneDials on a late-offset 52.3mm car. These stick out 29mm more than the proper 52.3mm offset wheels for your car. They should actually be 16x7" PhoneDial 52.3mm offset wheels (part# 944.362.104.00) with 205/55-16 tyres.

[CHICKS]

Early rims on a late car. A 944s had 15" not 16" because the S still had the small NA brakes.

[Rasta Monsta]

They don't look early offset to me.

[9FF]

Originally Posted by Rasta Monsta

They don't look early offset to me.

+1 they look like the stock 15" late offset phone dials, the rear lip on the rim isn't as wide as early offset phonedials. It's a poor picture so I could be mistaken.

If they are early offset wheels then that's your issue but I don't think they are.

[Gawernator]

Height looks off to me... Check it at factory settings

[ilikemy944]

Ok that looks low, but does not look near low enough to rub. Especially while cruising.
Are you sure a tire is actually rubbing? Is there visible wear somewhere? If so, where?
A rubbing noise could be a bad wheel bearing or even the exhaust touching the car.

Unless one of your used konis is dead...?

[ilikemy944]

Also, are the bump stops installed in your shocks?

[DannoXYZ]

Also check your parking-brake cable. It should be close to the spring-arm, but I've seen some that have gotten yanked out of place and rubbed on the inside of the tyre.

Hard to tell offset and rim-lip due to side-view. Please post a picture from the rear and 3/4-rear view.
And find the part# off the wheels to know for sure.

BTW, anyone happen to know what size is the spare-wheel on a 951?

[crossrocker]

Thanks for all the replys guys. I have the car up on jack stand now, but as it turns out working with your primary hand injured is not easy. I took some better pictures with a real camera.
Currently I'm following the instructions here: KB Results because I assume that ride height is the issue here. If it is the offset, you guys should be able to let me know with the new pictures.

As far as the shocks go, I'm pretty sure they're good. I set the rebound rate on both of the rears at 30 seconds which works for me. They function a lot better then the crapped out KYB's I had on before. The bump stops are definitely installed. I dont think its the shocks because the tires have been rubbing from the start.

I know for a fact that the tires are rubbing under hard cornering. There were little shavings flapping off the tires when I did the suspension work and went for a "spirited drive". I can't say the noise coming when coasting is 100% from the tires because it's a different, more consistent rubbing sound when compared to the harsh scraping I hear when going over bumps or under hard cornering.

I think I addressed everyone's reply for now. I'm gonna go and try again to get these damn bolts to budge.

High quality pics here: https://plus.google.com/photos/100554954740477625319/albums/6064649629833788481?authkey=CLKvtfuIoZ_gTA

[crossrocker]

[DannoXYZ]

Is it rubbing on the inside or outside?
Where are the shiny spots on the car?
Any luck with finding the part# on the wheels?

They should be behind one of the spokes. Should be one of the following:

944.362.104.00
951.362.104.00

Or just find the size and offset numbers. This is a 16x7" wheel with 52.3mm offset shown below.


Also make sure you don't have any spacers on the hubs.

[crossrocker]

Originally Posted by DannoXYZ

Is it rubbing on the inside or outside?
Where are the shiny spots on the car?
Any luck with finding the part# on the wheels?

They should be behind one of the spokes. Should be one of the following:

944.362.104.00
951.362.104.00

Or just find the size and offset numbers. This is a 16x7" wheel with 52.3mm offset shown below.


Also make sure you don't have any spacers on the hubs.

On hard cornering, I believe the inside is scraping and on coasting the outer fender well is rubbing. Not a hundred percent sure about this.

I'll check the part numbers.

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[Rasta Monsta]

Originally Posted by crossrocker

On hard cornering, I believe the inside is scraping and on coasting the outer fender well is rubbin

Gah!

Wheel bearings?

[9FF]

Quote de crossrocker

On hard cornering, I believe the inside is scraping and on coasting the outer fender well is rubbin

Gah!



Wheel bearings?

There is no way a stock 215/60r15 tire is rubbing on both inside and outside without there being something else wrong.
Are you sure it's the tire that is rubbing?

[crossrocker]

So turns out the wheels are from an early.

There's some late phone dials for sale here in Chicago with some winter tires on. Will they solve my troubles?

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[9FF]

Originally Posted by crossrocker

So turns out the wheels are from an early...There's some late phone dials for sale here in Chicago with some winter tires on. Will they solve my troubles?

They will definately stop the rubbing on the rear fender but you still have to figure out what's rubbing on the inside of the tire. Late offsets will just make that worse.

Saying that you are definately going in the right direction getting the late offsets which are the correct wheels for your car.

[crossrocker]

Originally Posted by 9FF

They will definately stop the rubbing on the rear fender but you still have to figure out what's rubbing on the inside of the tire. Late offsets will just make that worse.

Saying that you are definately going in the right direction getting the late offsets which are the correct wheels for your car.

Ok I'm gonna go ahead do that soon. I will report back in a couple of days. Thank god I don't have to get these damn control arm bolts off!

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[crossrocker]

Quick question guys, I hear winter tires get ruined if you drive them in warm temps. I'm in Chicago and temps are starting to get cold but some days are still warm. I cant ruin the tires all that much can I?

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