Ive got -60mm springs on the front of my motor, and it took me ages to find somewhere thatd track it up (with the car being sooooooo low they couldnt get the valance clearance for the lazer).
But I went to Bush tyres in Hull, and they did a full 4 wheel lazer line on the car, and tracked it all up for £25.
The thing is with my car being too low, its put the camber out so it wears the inside edge of the tyres a little bit quicker than the rest of the tyre.