Just wanna share my experience tht i had on my car. I changed the upperarm&lower arm bush bout 50,000km ago. got 17" RD rims installed on my car bout 1 1/2 years ago + new 235/45/17 tyres installed with it..been experiencing vibration @around 90km/h recently (bout 5-6mths). so my first suspect ofcos wud be the upper arm bush. checked both were solid as new..i even check whole nut bolts, u name it ive checked it but everything were intact...wt#$% next rebalanced the tyres (off wheel), the vibration @90km/h reduced, but still can feel on steering wheel... still not happy but atleast betta than b4.just now i went and change all the tires... threads are still ok on old tires but not happy as noisy on highway...on the way back, steering felt solid @90km/h wt*&^^ , i drive all the way back 90km/h for a while becos havnt drive @tht speed for some time due to the bad vibration. so its cuntfirm tht tires can cos those infamous 90km/h vibration, apat from upperarm bushes... so guys...if u hv the symptom, anuther thing to check is ur bad tires....:rock: