New rear tires rubbing
05-07-2006, 09:47 AM
#1
Track Day
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New rear tires rubbing
I just replaced all four wheels & tires on my 964 turbo and
now the rear wheel (primarily passenger side) is rubbing
on inside fender lip (when road dips even slightly).
New tires are 265/30/18 (originals were 255/40/17).
Wheel vendor suggest "rolling the fenders" but that sounds
like something I don't want to do.
Any suggestions? Should I go back to a 255 tire or look into
modifying the rear suspension (to reduce the travel)?
Could it be due to the new 3-piece wheels (RH 3.6)?
now the rear wheel (primarily passenger side) is rubbing
on inside fender lip (when road dips even slightly).
New tires are 265/30/18 (originals were 255/40/17).
Wheel vendor suggest "rolling the fenders" but that sounds
like something I don't want to do.
Any suggestions? Should I go back to a 255 tire or look into
modifying the rear suspension (to reduce the travel)?
Could it be due to the new 3-piece wheels (RH 3.6)?
05-07-2006, 10:30 AM
#4
Track Day
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I did not check the offsets before installing the wheels. I need to call
the wheel vendor (he stated he had the same car and guaranteed a
perfect fit). What offset did you use?
I just took another look at the car and noticed two things. 1) The rear
tires extend out about 1/2" beyond the fenders (okay?), and 2) there is about 3/8" more clearance above the drivers-side tire vs. the passenger side.
Just looking at the car I can't notice a drop on the passenger's side
but it's clear there is a difference when I place my hand on top
of the rear tires.
Since the drivers-side is okay, I believe I should have the suspension
checked out. What do you think?
the wheel vendor (he stated he had the same car and guaranteed a
perfect fit). What offset did you use?
I just took another look at the car and noticed two things. 1) The rear
tires extend out about 1/2" beyond the fenders (okay?), and 2) there is about 3/8" more clearance above the drivers-side tire vs. the passenger side.
Just looking at the car I can't notice a drop on the passenger's side
but it's clear there is a difference when I place my hand on top
of the rear tires.
Since the drivers-side is okay, I believe I should have the suspension
checked out. What do you think?
05-07-2006, 10:39 AM
#5
Racer
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Location: Watertown, CT
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If your rear tires are extending out about 1/2 inch from the fender, then I don't think that "rolling" the fenders is gonna help.
What Christer said ...
What Christer said ...
Last edited by Slappy; 05-07-2006 at 11:02 AM.
05-07-2006, 01:44 PM
#7
Three Wheelin'
You need to get the tires inside the fender lip and at an even height.
Remove a tire and see what width of spacer you are running and adjust as necessary. If you post your wheel offset on here someone can probably tell you what size you need.
Secondly you need to get your ride height adjusted so the rear of the car sits flat to the pavement.
Kirk
Remove a tire and see what width of spacer you are running and adjust as necessary. If you post your wheel offset on here someone can probably tell you what size you need.
Secondly you need to get your ride height adjusted so the rear of the car sits flat to the pavement.
Kirk
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05-08-2006, 10:56 AM
#9
3/4" spacer is around 19mm which means your offset is around 35. I would go with a spacer of around only 6 mm. Most 964's have *some*variation in ride height or side-to-side measurements but what you describe would seem to be a bit extreme.....so a bit of suck-it-and-see is probably necessary. FWIW, I run 10 inch rears with 265's and I chose to take a hammer to the oil line to flatten it slightly but no problems and no rolled fenders....
From memory I also use a 3mm shim....
From memory I also use a 3mm shim....
05-08-2006, 11:56 AM
#11
Originally Posted by hp700
For the heck of it, I removed the 18mm spacer and mounted the
tire to check the fit. It seems to clear everything and doesn't
look bad. Is a spacer necessary?
tire to check the fit. It seems to clear everything and doesn't
look bad. Is a spacer necessary?
I presume you didn't just mount the wheel and spin it with the car in the air? You need to put it on the ground and drive it. I would recommend putting chalk marks on your oil line and inside of the fenders. Then drive the car as it will be much easier to see if the chalk has been disturbed by rubbing (especially if your is quite clean!). One thing to also bear in mind is that you can dial in more negative camber if you have real space issues on the outside...but how much you want of that is a personal choice.
