Which number in the tire size determines the profile of the tire...and is the smaller the number the lower profile
they all determine but the first number is how tall the tire is the second is how wide..the wheel size bigger the wheel smaller the profile.... the last is the size of wheel.... whats the size of tire you working with.... here try this site you can put in your info and get a somewhat of what you need
It would help if you had given an example for your question, but since you didn't - I'll give you one of my own. My truck came with the tire size 195/75/14 The tire is 195 millimeters wide. The middle number 75 tells you the aspect ratio. There is a complicated formula that I could lay out there, but it probably won't help ya. A 75 series tire (if the 1st and last number are unchanged) will be a taller tire than a 40 series tire. 14 inches tells you the diameter of the wheel or rim that the tire is mounted on. This part you cannot change. A 14 inch wheel must have a 14 inch tire mounted on it. You can do some different sizes on the first two numbers. For instance I did not like the skinny look that the tire had so I bought some "fatter" looking tires for the 14 inch wheel (rim) I used a 235/60/14. This made the tire 40 millimeters wider while keeping the overall height of the tire very close to the same, which makes the speedometer stay correct. Any more questions you can call me at work Mon - Fri 513 874 2500 ask for Brian. 7am - 6pm Eastern
