Maybe a sports diesel that is used all weathers, most days, is not the 1st choice of car for these tyres but I expect my vehicles to perform whatever the conditions and hence fit tyres I expect to give confident and secure handling characteristics. Purchased the asymmetrics' in April 2009 After 2 sets of F1 GSD3's and have been disappointed in their performance, particularly compared to the previous GSD3's,they were a far superior tyre for feel and grip in a wide range of conditions. The 1st impressions of the asymmetrics' was favourable but as the tread depth fell below 6mm they have deteriorated noticeably to the point I find the 4 wheel drive system & stability control struggling to keep effective control on occasions, limiting my speed of progress whilst still not feeling secure . This has been very noticeable through some sharp bends & hairpin drive over regularly, with the GSD3's I used to turn the stability control off and enjoy, with the asymmetrics' I simply daren't.