I know this isn't exactly the same, but you may have noticed I run three OHTSU Pro-Vector H-Trac II's (pretty close to a 4-Snow) on my camo US90. I do find that when you start turning on slippery surfaces the front tire skids out just the same when the tire comes off the centre onto the shoulder tread. Like you stated, the rears grip a little too much at times. I have to agree that a shoulder studded knobby would be my choice for icy roads.