New member, handling issue

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   HiNew to the club
I’ve a 2010 Z4 E89 3.0 sdrive auto on 18” run flats. Owned her 18 months
When failing to avoid pot holes, I feel a kick sideways at the rear
Never worried me too much, however I snapped a front coil spring so put a full bilstein eibach suspension kit on her, as you do
The cars a lot more compliant, rather than stiffer, which is good, but f**k me the kick is worse
I measured the geometry with a string box, both rear wheels were pointing right!! I corrected that and gave it about 1mm per side of toe in on the rear, but still no difference to this nasty little kick!
Any ideas? I’m guessing bushes? I can’t feel any play 
Or is it inherent with run flats??
Cheers

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Westysprinter Members Profile Send Private Message Find Members Posts Add to Buddy List Club Member Joined: 05 Dec 2023 Location: North East Status: Offline Points: 3	Post Options Post Reply Quote Westysprinter Report Post Thanks(0) Quote Reply Topic: New member, handling issue Posted: 05 Dec 2023 at 9:44pm
	Hi New to the club I’ve a 2010 Z4 E89 3.0 sdrive auto on 18” run flats. Owned her 18 months When failing to avoid pot holes, I feel a kick sideways at the rear Never worried me too much, however I snapped a front coil spring so put a full bilstein eibach suspension kit on her, as you do The cars a lot more compliant, rather than stiffer, which is good, but f**k me the kick is worse I measured the geometry with a string box, both rear wheels were pointing right!! I corrected that and gave it about 1mm per side of toe in on the rear, but still no difference to this nasty little kick! Any ideas? I’m guessing bushes? I can’t feel any play Or is it inherent with run flats?? Cheers

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NickDE Members Profile Send Private Message Find Members Posts Add to Buddy List Region Chair North East Chairman Joined: 14 Mar 2015 Location: Newcastle Status: Offline Points: 1139	Post Options Post Reply Quote NickDE Report Post Thanks(0) Quote Reply Posted: 08 Dec 2023 at 8:24am
	Hi, welcome ! We will be very pleased to see you at North East Region events https://www.facebook.com/groups/bmwccgbneregion I expect the hive mind will say non-run flats will make a big difference
	Darkness gone, Tronic gone, Solo gone, DBA gone, go Darknes2, go Frozen, go Black Pearl, go Echo. RIP The Vibrator

Westysprinter Members Profile Send Private Message Find Members Posts Add to Buddy List Club Member Joined: 05 Dec 2023 Location: North East Status: Offline Points: 3	Post Options Post Reply Quote Westysprinter Report Post Thanks(0) Quote Reply Posted: 19 Dec 2023 at 7:53pm
	White line poly bushes and she’s fixed, disappointed to receive little advice from the uk Forum, but my neighbour an ex service manager who contacted BMW direct.