Well here is my 2 cents. I have 2 122s, one with orginal style rubber, and the other with IPD poly. I much prefer the rubber, and so do other vintage volvo owners I've polled since installing the poly. The poly produces a notably harsher ride, especially in fridged winter conditions. The rubber provides a smoother, more nicely dampened ride.

I would say this, however, that I am not into performance. If you're into racing, the poly is what you want.

A combination of the two may be interesting, however, and I would be interested in hearing a discussion about which ones to make poly and which rubber ;-).

Mark Sloo
Minneapolis, MN