Maybe not with minis as there isn´t so much weight. My SMV mentioned had 9 inch wheels and I had 2 blow outs with new tyres and innertubes. Guy in the trade said that the smaller the wheel the lesser the rubber on the road and less air in the tyre. On long journeys the small wheels can heat up because the rubber of the tyre is nearly always on the road/friction. This heats the air inside, that expands and ..... bang
.. and yes I´ve always had proper high speed tyres and inner tubes.