On Sat, 24 Nov 2012 12:41:45 -0500, "(PeteCresswell)"
wrote:

Per :
Decent ice and snow tires can handle snow at 55 without any problem.

Problems I've had were on long gradual ascents.

At some point in the increasing grade, the load on the drive
tires exceeds their traction and they start to spin.

Not a big deal once you figure out what's going on, but the first
time the vehicle starts slewing side-to-side for no apparent
reason, there's a "WTF?" moment.
Or like the time i hit black ice on the road along the Conestoga
River with the 69 dart. I was just poking along and I thought it felt
like I had a slack tire. I got out and promptly sat on my ass on the
pavement. I couldn't stand on it - yet I could drive on it - and that
was without studs.