205 is the width of the tire in millimeters; 235 is 20mm wider than a 205
55 is the aspect ratio.. the height of the sidewall; so a 55 series tire is shorter than a 75 series tire
16 is the rim diameter in inches
91 is the load index.. 1356lbs in this application
H is the speed rating... 130mph in this application
A 235/55R16 is wider AND taller than a 205/55R16. This is because you are 20mm wider, and since the sidewall is a percentage of the width, your sidewall will be taller as well.
Also if you were to compare a 205/55R16 to a 205/55R17, the 17 would be the taller tire, but the same width.
Here is a page that has the charts for the load index and speed ratings of a tire.
Comments
205 is the width of the tire in millimeters; 235 is 20mm wider than a 205
55 is the aspect ratio.. the height of the sidewall; so a 55 series tire is shorter than a 75 series tire
16 is the rim diameter in inches
91 is the load index.. 1356lbs in this application
H is the speed rating... 130mph in this application
A 235/55R16 is wider AND taller than a 205/55R16. This is because you are 20mm wider, and since the sidewall is a percentage of the width, your sidewall will be taller as well.
Also if you were to compare a 205/55R16 to a 205/55R17, the 17 would be the taller tire, but the same width.
Here is a page that has the charts for the load index and speed ratings of a tire.
http://www.tirerack.com/tires/tiretech/techpage.js...
205 is the heighth of the tire, 55 is the width, and 16 is the rim size that the tire needs which is a 16" rim, and I don't know what the 91H is.
You just need to go to a tire shop and they will tell you.