hi mate,
dont know whether this is going to help you or not, but i got an st170 had good tyres on it but they were worn (on front) so i put new tyres on it only cheap ones (was a bit skint at time) and got the tracking done at the same time. now no matter what pressure i put in them it wanders when it hits a bump it feels like the off side wheel has a mind of its own!

because i put the tyres on a few months ago have noticed that the off side tyre is wearing on the outside really badly so i reckon the fella has tracked the car badly.

so now what i plan to do is get a full wheel alignment some more new front tyres (named) and then get it tracked again i reckon that'll sort the problem, will let you know.


have you had a wheel alignment? is the tracking out? do you have a weak shock? how much is the car lowered by?