I run winter tyres on my car each year, having done so since the car was new in 2010. The winter tyres (bought new in December 2010) have entered their sixth spell on the car and still have a decent amount of tread left (around 4mm). They are Continental TS830Ps. I swapped over the weekend before last, but due to illness have only driven the car a few times since then. I am finding it a very different kettle of fish compared to when it was on its summer set. The steering is very light at all speeds and the car seems a bit wayward. It had a bit of a wobble this morning (damp) and did a sideways slide around a corner on black ice last week (never happened before). The car runs a different configuration in winter compared to summer: * Summer - 225/45 R17 on 7Jx17 wheels. * Winter - 205/55 R16 on 6Jx17 wheels. These are the manufacturer (VW) recommended sizes for both seasons; both sets of wheels are genuine OEM ones. I do not remember the car being so different when on winter tyres in previous years. Is the different handling I'm experiencing likely to be because of the different width of wheel and tyre, or is it time to buy a new set of tyres? I'd prefer not to do the latter, as the car is being replaced in March.