Has anybody found a set of winter wheels/tyres for the RS3? My local dealer says Audi are not as yet selling these (may do so later this year apparently but no guarantees) but I, for one, would be very interested in a set for use over the November-March period and wonder if anybody can recommend a 3rd party option. I assume they'd have to be on an 18in wheel given the size of the brake disks but am happy to be corrected on this?