Hi, I have an S3 which needs two new rear tyres. Currently have Bridgestones all round but would like to swap to Eagle f1s. However, fronts are still very good. So, anyone know whether I can run goodyears on back whilst keeping my bridgestones on front? I have been told this shouldn't be done as it may harm the haldex system...anyone any experience or advice they could offer me on this. Tyre fitters have told me completely contradictory things, so I'm hoping for some unbiased advice/actual experience etc. Cheers guys, Pete.