Looking for some guidance to help me diagnose some vibration I am getting from my E90 335i. Never noticed anything previously, then got a new set of tires all round, replacing the runflats with S001s. Now get a vibration/shake through the steering wheel at speeds from 90kph+. Also sometimes get some vibration under braking, I don't recall noticing this before, could be related or a coincidence. I assumed it was a balancing issue so took it to the tire place across the road for them to check, they rebalanced but said it was pretty good (I'm assuming the place that fitted the tires in the first place also did a balance). Made a small improvement but there is still noticeable vibration there. My question is do I take it to a specialist wheel alignment/balancing place for another look (do they have better equipment than your local Firestone etc), or do I start looking at other things suspension etc..?