Good day…I am new here (since 10.01.2016 Proud owner of the Smart) and have been looking for an answer in the net for a long time. As winter tyres I have the size in front 145/65 R15 72T and in the rear 175/55 R15 77T… As far as so good… are exactly the sizes which are also in the vehicle license, but the summer tyres on Alu of the brand Sportiva have all 4 the size185/55 R15 82V. Can you drive this without hesitation, since it is always advised to choose a little smaller tyres in front? Also in the respect that the Smart unfortunately has no power steering, but with which you can get quite well. The Tüv is also available in June, not that you get problems because of this.