Is there a reason for these abominations... other than to save me some trunk space? I had to put one of those on and I made it maybe 10 miles driving very carefully over a snow covered mountain pass. It said not to exceed 55 mph right on the tire and coasting downhill I got up to 45 mph and the
spare goes flat. The car felt weird the whole time I had the spare on it and I wouldn't have been comfortable going faster than 45, let alone 55. I understand it's a temporary tire until you can get service, but I still don't understand it. Why not use a real tire?