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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 01-05-2007, 12:56 AM   #1
Geeves
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Join Date: Feb 2006
Location: South Africa
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My Ride: 1999 BMW 323i Steptr
Pls hlp! Desperate! Vibration!

To make a veeeeeeery looooooooooong story as short as possible, my car (a 1999 323 Step with about 65,000 very well cared for miles on the clock) developed a vibration from about 70 mph onwards (getting worse the faster you go) after i put on a set of new tyres (195/95/R15V Bridgestone Turanza ER300's).

Logic dictates a problem with the tyres seeing that it only started after the new tyres were fitted, however, two tyre shops have been unable to find anything wrong with them or the rims and my local BMW specialist have confirmed that the cannot find anything wrong with the driveline (i.e. steering rack, tie rod ends, shocks, propshaftm driveshafts etc. even after replacing lower control arm bushings just to be sure).

Now the following is what I cannot understand:

The car still vibrated in the same way after another set of tyres (of the same make) were fitted which suggest it is NOT the tyres.

HOWEVER

If the car is put on a lift and the rear wheels are spun freely (i.e. put you foot on the gas) a vibration of most horrible proportions can be noticed on one of the rear wheels (No vibration can be felt through the driveline when the wheels are off and the car is tested in the same way) yet the tyre shop says there is nothing wrong with the tyre or rim and their balancing machine picks up perfect balancing!?

Pleeeaaaasseeee help!!!!! I am at a loss at what to do next!!!
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Old 01-05-2007, 01:05 AM   #2
FerrariTruck
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Join Date: Aug 2006
Location: PASADENA CA
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Quote:
Originally Posted by Geeves View Post
To make a veeeeeeery looooooooooong story as short as possible, my car (a 1999 323 Step with about 65,000 very well cared for miles on the clock) developed a vibration from about 70 mph onwards (getting worse the faster you go) after i put on a set of new tyres (195/95/R15V Bridgestone Turanza ER300's).

Logic dictates a problem with the tyres seeing that it only started after the new tyres were fitted, however, two tyre shops have been unable to find anything wrong with them or the rims and my local BMW specialist have confirmed that the cannot find anything wrong with the driveline (i.e. steering rack, tie rod ends, shocks, propshaftm driveshafts etc. even after replacing lower control arm bushings just to be sure).

Now the following is what I cannot understand:

The car still vibrated in the same way after another set of tyres (of the same make) were fitted which suggest it is NOT the tyres.

HOWEVER

If the car is put on a lift and the rear wheels are spun freely (i.e. put you foot on the gas) a vibration of most horrible proportions can be noticed on one of the rear wheels (No vibration can be felt through the driveline when the wheels are off and the car is tested in the same way) yet the tyre shop says there is nothing wrong with the tyre or rim and their balancing machine picks up perfect balancing!?

Pleeeaaaasseeee help!!!!! I am at a loss at what to do next!!!

Get your wheels balanced again...When they throw em on the balancer make sure that the hub they use to center the rim on the spindle is the type with 5 studs that center using the lug nut holes and not the center of the rim...I'm pretty sure this will solve your issue
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Old 01-05-2007, 01:34 AM   #3
Geeves
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Originally Posted by FerrariTruck View Post
Get your wheels balanced again...When they throw em on the balancer make sure that the hub they use to center the rim on the spindle is the type with 5 studs that center using the lug nut holes and not the center of the rim...I'm pretty sure this will solve your issue
Thanks, but both tire shops have used the hub that line up with lug nut holes...so i doubt whether this will make a difference. What I am wondering about is do these machines they have at tire fitment centres pick up ALL unbalancing??
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Old 01-05-2007, 01:38 AM   #4
D2-AUTOSPORT
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Perhaps take the front wheels and swap them with the rear and see if vibration moves to the front? It honestly sounds like a balancing problem if the rim is perfectly fine.
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