PS wheel bearing

Bernie Benz b.benz at
Tue Apr 29 12:06:10 PDT 2008

You’re basically right, Ed. Has nothing to do with the tire or wheel  
excepting the wheel’s offset. i.e. where the center of force is  
applied relative to the center of the double row ball wheel bearing,  
not the center of the car.


On Apr 29, 2008, at 11:38 AM, Ed Kellock wrote:
> I would suggest that your difference in bearing noise is a function of
> the size of the wheel primarily and possibly somewhat of the tire.
> Geometrically, with a 8.5-inch wide et30 wheel, you're putting more
> leverage on that bearing since more of the wheel/tire is further out
> away from the center line of the car.  Basically you're leaning on the
> bearing harder and more unevenly.
> Ed
> On 4/29/08, Nathan Winters <natewin at> wrote:
>> When I run my snows 265/65-15 I get very little to zero noise from  
>> my drivers-side rear wheel bearing.
>> When I run my summer 235/45-17 tyres I get quite a drone from the  
>> drivers-side rear bearing.
>> Turn left the sound goes away, straight/right the noise is about  
>> constant.
>> Are the tyres the same size as before?
>> FYI
>> I'm not sure what the steel rims that my snows are on but my  
>> summer tyres are on Borbet Type TS:  17x8.5 30mm offset.

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