I would not. There are no sipes (tiny groves in the tire that provide biting edges that grab on to pavement) in the PS2's. I'd suggest STRONGLY you switch all 4. Think of it like this: What would you rather have when running accross a frozen pond? Dress shoes or Golf shoes with sharp metal spikes?

P.S. The Pilot is not an A/S tire its a SUMMER only high performance tire.

P.P.S. If your sprining for rims than get a 17" rim and winter tire package.