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Message: <blockquote data-quote="wptee" data-source="post: 313382" data-attributes="member: 2856">San, in fact when I installed that e39 wheel on my e32, the tyres were 2nd hand with 50% left, didn't know tyres would cause vibration. Maybe its also the hub centric ring like what loafer said. I am still using the ori 15inch wheel, used 205/65/15 for years, recently changed to 215/65/15 and the same vibration problem occurs even on same wheel. If its same wheel=same et, why vibrate when brake at 120-80kmph? tyre size matters? 215/65 is higher profile than 205/65 so what turbology said should not happen, as with the 205/65 tyres no vibration etc therefore brake disc, upper lower arms, bush all in good condition. I am planning to change to a 17inch wheel from an e60 style 138, 225/50/17 7.5j et 20, and the centre bore is also the same size as e32, so no hub centric ring required, eliminating the possibility of hub centric ring failure, but am still cautious about it that it might shimmer again and need all the sifu advice available here <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> The link to where I got the centre bore size is here :<a href="http://www.meeknet.co.uk/E32/E32_Shimmy.htm" target="_blank">http://www.meeknet.co.uk/E32/E32_Shimmy.htm</a>Notice that the centre bore of e39 differs to e32 thats why require hub centric ring, but e32 and e60 centre bore are the same, but I still worry it might vibrate for reason unknown to me yet.</blockquote>

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