tires on a 100cs

[Brian Devlin]

Changing the tire diameter also changes the relative positions of the
tire center and the steering axis at the contact patch. Here a
diagram of the situation:
http://lah-electra.stanford.edu/camber.html. I think the cure for you
car is to change the camber until you like it.
-Brian

>
>>   I went up to 205/55/15 V rated.
><snip>
>  > my car now tends to follow the grooves in the road
>