i use 17" in the winter i had primacy's on a 55 profile never had any traction problems, i dont really commend the extra cost of changing to a winter tyre when i use the 17's every year in the snow they are fantastic and they cover up most of the breaks so less crap get's in at the wheels and disc's just drive with more caution, i agree that the traction is great but the breaking is hairy to say the least the abs dose tend to have a slight aneurysm when on a icy surface almost a shame it cant be turned off when needed, just my 2 pence worth
