RtC, those are different profiles of a tire size. You should not put tires on your car that are not meant for the car. Your manual will tell you the acceptable tire sizes re the height, width and depth of the tire. Go in to a car dealership of the make of your car, or even Canadian Tire. They have all the specs for the various cars.
It all depends... from the good folks at [url-http://miata.net/garage/tirecalc.html]miata.net[/url]Will 175 70 R13 tires replace 155 80 R13 tires without problems?
Should be in the owners manual under "Specifications" or some such word.I will have to check I guess.. no idea what's on there right now. The width is edge to edge I presume..