I just got my tires replaced however I noticed there is a slight difference in the numbers from what I used to have. So not sure if it means anything. So here goes... Apparently my Goodyear marathon tires were well over 8 years and more than needed to be replaced. Those tires were st185/80R13 load range C radials. So the shop replaced them with...Cralisle 175/80r13 load range c radials. My question is regarding the 175 vrs 185 number? What is the difference? I did not feel any difference in the towing aspect, then again rush hour traffic is really not a good test. Also does anyone know how good Cralisle tires are? I never heard of them before, I would have preferred Goodyear but I was desperate for tires and it's what the shop had in stock. I was planning a last minute trip, as usual, and needed those tires replaced quick.