Tire Ratings
Correct me if I'm wrong, but aren't all tires of the same type (ST/LT) and the same size (225 75R15) and same load range (C,D,E) rated just the same (as to weight capacity) regardless of manufacturer?
Forum Discussion
ktmrfs wrote:
For a given tire size and ply rating they are the same IF and ONLY if they have the exact same load INDEX. They have replaced the ply rating and size to determine load rating with a 2 or 3 digit number giving the load index. load index goes from around 70 to at least 150. For a given tire size and ply rating the load index can vary slightly. For instance, on my truck tires I've seen load index of 116 or 118 depending on specific tires.
Although you will find load index information on most all LT & ST tires along with a load range letter. Only the load range letter is official for those tires. It's a long story and you can find the rational for it in NHTSA's rules change package of 2007.
