Continental DWS...run them on both the Fiesta ST and Focus ST. Focus is slight better in the snow than the Fiesta due to power delivery but the tires are awesome in light wintery conditions. I've used them up to 2.5" snow/ice without a problem. Slow and steady is key in slipper conditions.
Passed a few 4x4s in ditches on the way before these pictures.
Passed a few 4x4s in ditches on the way before these pictures.