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General E46 Forum
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Old 03-25-2009, 12:32 PM   #1
Kingnog
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40mph+ vibration

Hi all,

I just did a tire swap myself, changed all 4 wheels and tires (took off my winter tires, put on my all seasons, each set has its own rims).

I noticed a vibration through the steering wheel and gas pedal, and I can see the rearview mirror vibrating slightly. It is strongest around 60mph.

One of my rear tires has a *slightly* bent rim, similar to the guy in this post: http://forum.e46fanatics.com/showpos...63&postcount=2


My question is: Will a bent rim on a rear tire cause this? I thought only the front tires would affect the steering wheel. The rims are stock alloy 16".
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Old 03-25-2009, 12:36 PM   #2
n2Bimmer
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First of all, why did you mount your own tires, unless you have a shop and the right tools. Second yes the bent wheel will cause the car to shake, the rear, the seats, the mirrors, the pedals etc etc. You mounted your tires on wrong, You need to get them road force balanced. Recently i put on BRAND NEW Bridgestone RE01R's on the rear and they were vibrating, my seat and the floor pan. I took it back and they put it on the road force machine and it said that the tires needed to be removed and re intalled but this time move 180 deg from the rim. They did this on both rear wheels and road forced it. Its all good now.
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Old 03-25-2009, 12:41 PM   #3
Kingnog
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Well, I had these tires on the car before winter, I thought putting them back on wouldn't require rebalancing.

The vibration is slight, passengers don't seem to detect it. I just know it's there because I know how it used to drive with the winter tires.
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Old 03-25-2009, 12:50 PM   #4
n2Bimmer
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Originally Posted by Kingnog View Post
Well, I had these tires on the car before winter, I thought putting them back on wouldn't require rebalancing.

The vibration is slight, passengers don't seem to detect it. I just know it's there because I know how it used to drive with the winter tires.
Anytime you remove the tire off the wheel you must rebalance it. So you didnt even re balance it. You need to do that, Get a regular balance first, if that doesnt help get it road forced.
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Old 03-25-2009, 01:15 PM   #5
Kingnog
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Quote:
Anytime you remove the tire off the wheel you must rebalance it. So you didnt even re balance it. You need to do that, Get a regular balance first, if that doesnt help get it road forced.
I think we had a miscommunication - I did not take the tires off the wheels. I have 2 sets of rims and tires, I just swapped the steel rims/snow tires for the alloy rims/all-season tires.
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Old 03-25-2009, 01:31 PM   #6
Izrailov
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Quote:
Originally Posted by Kingnog View Post
Hi all,

I just did a tire swap myself, changed all 4 wheels and tires (took off my winter tires, put on my all seasons, each set has its own rims).

I noticed a vibration through the steering wheel and gas pedal, and I can see the rearview mirror vibrating slightly. It is strongest around 60mph.

One of my rear tires has a *slightly* bent rim, similar to the guy in this post: http://forum.e46fanatics.com/showpos...63&postcount=2


My question is: Will a bent rim on a rear tire cause this? I thought only the front tires would affect the steering wheel. The rims are stock alloy 16".
Nope a rear bent rim will cause this. I had a slight bent in the passenger rear rim last year, took it into the tire guy and had him check it. He rebalanced the rim and it runs fine now.
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Old 03-25-2009, 01:39 PM   #7
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A bent wheel MIGHT cause a vibration.
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Old 03-25-2009, 08:40 PM   #8
Kingnog
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A bent wheel MIGHT cause a vibration.
Well....it's such a small dent that I didn't think it would have an effect, especially since it's one of the rear tires.
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Old 03-25-2009, 08:43 PM   #9
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Quote:
Originally Posted by n2Bimmer View Post
First of all, why did you mount your own tires, unless you have a shop and the right tools. Second yes the bent wheel will cause the car to shake, the rear, the seats, the mirrors, the pedals etc etc. You mounted your tires on wrong, You need to get them road force balanced. Recently i put on BRAND NEW Bridgestone RE01R's on the rear and they were vibrating, my seat and the floor pan. I took it back and they put it on the road force machine and it said that the tires needed to be removed and re intalled but this time move 180 deg from the rim. They did this on both rear wheels and road forced it. Its all good now.
Quote:
Originally Posted by n2Bimmer View Post
Anytime you remove the tire off the wheel you must rebalance it. So you didnt even re balance it. You need to do that, Get a regular balance first, if that doesnt help get it road forced.
lol relax, he never said he took the tires off...he swapped from winter to summer wheels/tires.

a bent wheel does not always cause a vibration. alot of bends if they aren't major can just balance out. seems to me like a weight might have fell off one of the wheels somehow. just get 'em balanced and check back.
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Old 03-26-2009, 10:38 AM   #10
n2Bimmer
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Originally Posted by Kingnog View Post
I think we had a miscommunication - I did not take the tires off the wheels. I have 2 sets of rims and tires, I just swapped the steel rims/snow tires for the alloy rims/all-season tires.
okay i see.
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Old 03-26-2009, 10:40 AM   #11
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A bent wheel will ALWAYS casue a vibration, unless your tire pressure is low and you suspension is sloppy and it just wont transfer. Ive had few wheels where you wont even see anything wrong with the rim but once you spin it you can slightly see it, this caused crazy vibration and shaking.


Quote:
Originally Posted by 330ciandr6 View Post
lol relax, he never said he took the tires off...he swapped from winter to summer wheels/tires.

a bent wheel does not always cause a vibration. alot of bends if they aren't major can just balance out. seems to me like a weight might have fell off one of the wheels somehow. just get 'em balanced and check back.
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Old 03-26-2009, 10:45 AM   #12
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Id say also that a bent rim will always cause a wobble, how can it not (unless already pointed out your tyres are not inflated properly or suspension is worn).
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