I find the wheels pull themselves into ruts pretty bad too, so maybe this is whats causing your tracking to go out all the time?
Most manufactures use steel and high quality rubber for there suspension components. But SEAT had the amazing idea of using cheese. On reflection i think steel and high quality rubber was the way to go.
Lol, not really Seats fault, more VW! I agree though, i was scanning the net the other week looking for info on something and stumbled across a reliabilty poll that said that over 50% of the problems on the ibiza are suspension problems. Had the suspension been designed better, the ibiza would have been a much better car...
I find it is generally sensitive to the road, in France mine pulled to the right!
That is normal, all roads are "crowned" in construction meaning that in cross section the middle is higher than the edges so the water runs to the edges (kerbs), some more so than others. In the UK we drive on the left so gravity will pull the steering slightly left. In countries where they drive on the right the steering will be pulled slightly right.
Why are other cars not affected by this though?
You all right saying that certain cars will be affected by crown of road but if alignment/geometry is off then it will be pulling more one side then other. If any vehicles had done bushes and subframe removed then it needs aligning it again after all work. VAG cars are prone to that problem due to way subframe is installed. It all can be corrected. We deal with those on daily basis.
We had this orginized http://www.seatcupra.net/forums/showthread.php?t=336251
to show how many times this problem is overlooked. If you guys have any suspension job done - MAKE SURE YOU DO FULL GEOMETRY READ-OUT!!!. Caster reading is the one that will indicate pull problem and possible subframe miss-align.
Dont fall for myth that VAG cars pull - Because they dont. If they are lowered they can still handle right dispite what you have done to your car. As long there is no loose/broken/bent parts then there is always way to make it go straight.
I think that you mean Skoda, as all these problem parts are Skoda made in CZ and really all we should expect from that country/company. Also I think that referring to them as being made from cheese is an insult to some good stuff (well some cheeses are good), I'd say that they are made from what our bodies turn cheese into!
Well my front tyres last 12-14k miles before inside 1" wears out yet rest of tyre still has 3-4mm tread. Had a full Geo alignment by someone recommended (OK but not going back!) and it was all in spec. So I live with the tyre wear. I know all about Geo alignments as one of my car is fully adjustable and I have been doing it and messing with it for 10 years. Are you suggesting this tyre wear is not standard (Cupra stock)? Seems a common problem for VAG with wide tyres.. Sorry for the thread hijack!
Oh and I don't think the Cupra is any worse than other cars for following the crown of the road... trick is to find a good well surfaced single track road that is straight and then while in the middle at 30-50mph... just let go of steering wheel (obviously keep hands hoovering over rim to grab it). If it is truely pulling you will find out then.