Help with tires, what do these numbers mean

[JCasper]

I am researching tires right now. I am looking at Toyos and Nittos, and even a few others. I really want a E Rated tire but was wondering what these numbers mean.



After the size there is a



126R

123R

121Q



What does all that mean.



Thanks, Joe

 

[bmoeller]

http://autorepair.about.com/cs/generalinfo/l/bldef_760a.htm