Hi, I have an old set of Fondmetal rims they are Italian and look a lot like BBS rims. I believe they are actually for a 242 and have 20mm offset (?..not positive).
When i am on flat roads all is Ok, but some of the highways around here have alot of truck traffic and are wavy with "truck ruts" where the constant run of 18 wheelerss have worn two valleys in each lane. The car seems to get trapped in there and wander within them.
I will check my alignment as it was done a while ago and with the vpd springs and such low profile tires it has hit hard on some road sections. ( I have cut my bump stops some).
I do have an air damn on the front.
In the future will switch over to 60's profile tires.

...And a note on speedometer error. I have passed several roadside police radar setups, where they have a radar set up and a sign to let you know your speed and each time I have been very accurate (30-45mph). So either they are not calibrated honestly or (and more likely) the original Volvo spedometers that everyone is relying on are about 5mph opyimistic and with the smaller tires Mine is actually more acurate. I am also judging by the flow of traffic I am driving with ie. if I was really only doing 70 when my spedo said 75, I would be getting passed by everyone. _just my opinion, not an absolute fact.
Thanks for all of the input from everyone.
CU