dptyrob Posted October 7, 2004 Share Posted October 7, 2004 Well, I goofed. I bought some tires off of ebay for our 90 Loyale wagon. I had looked some up on the tire rack and it listed the stock tire was 185/70/13. Apparently I got dislexic when I bought this set of 175/80/13's. Anyone have any idea of what I can expect with my speedometer reading and/or tire rubbing if I use these tires? The tires that are on it right now are 175/70/13's, and these 175/80/13's are noticeably taller. Quote Link to comment Share on other sites More sharing options...
Bucky92 Posted October 7, 2004 Share Posted October 7, 2004 Well, I goofed. I bought some tires off of ebay for our 90 Loyale wagon. I had looked some up on the tire rack and it listed the stock tire was 185/70/13. Apparently I got dislexic when I bought this set of 175/80/13's. Anyone have any idea of what I can expect with my speedometer reading and/or tire rubbing if I use these tires? The tires that are on it right now are 175/70/13's, and these 175/80/13's are noticeably taller. The middle number is your width..and the lower the number the wider the tire..the 80s will be fine..they are just a little narrower than what you are running right now. I always run 175/70/13 on all three of my Subs I had. Quote Link to comment Share on other sites More sharing options...
dptyrob Posted October 7, 2004 Author Share Posted October 7, 2004 The middle number is your width..and the lower the number the wider the tire..the 80s will be fine..they are just a little narrower than what you are running right now. I always run 175/70/13 on all three of my Subs I had. Good deal. Maybe the reason these look taller is because they're not mounted. So the lower the middle number, the wider? Quote Link to comment Share on other sites More sharing options...
MorganM Posted October 7, 2004 Share Posted October 7, 2004 175/70 R13 is 22.6 in tall and the ones you bought are 24 in tall. The width is the same. They will still fit and should not rub. Here is a tire calculator http://www.miata.net/garage/tirecalc.html Quote Link to comment Share on other sites More sharing options...
dptyrob Posted October 7, 2004 Author Share Posted October 7, 2004 175/70 R13 is 22.6 in tall and the ones you bought are 24 in tall. The width is the same. They will still fit and should not rub. Here is a tire calculator http://www.miata.net/garage/tirecalc.html Thanks, that's pretty helpful. Looks like I'm looking at throwing it by just over 4 mph @ 70 mph. If I did my math right, it looks like it will be reading 65.73 @ 70. Quote Link to comment Share on other sites More sharing options...
Cougar Posted October 7, 2004 Share Posted October 7, 2004 I think what was stated about the middle number is incorrect. Using the size 175/70/13 for instance. The 70 represents a ratio for the sidewall, or 'profile' of the tire. The lower the number, the smaller the distance between the outside of the rim and the tread of the tire. So a 175/60/13 will be smaller viewed from the side. A lower profile will give better stability. Here is a description I copied that tells what the numbers mean. The following is an example to help to decode a tire size like 185/65R14 185 = tire width in millimeters, measured from sidewall to sidewall 65 = sidewall ratio, the ratio of sidewall height to tire width 14 = wheel rim diameter in inches Quote Link to comment Share on other sites More sharing options...
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