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Looking for some new tires, but I don't know what the difference is between these three tires. The sizes read as follows:

LT265/70R-17/C1 112R
LT265/70R17C1 112Q W
LT265/70R-17/E1 121R

After the 17, I don't know what any of those numbers or letters stand for. Please help. Thanks.
 

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frankwasabi said:
Looking for some new tires, but I don't know what the difference is between these three tires. The sizes read as follows:

LT265/70R-17/C1 112R
LT265/70R17C1 112Q W
LT265/70R-17/E1 121R

After the 17, I don't know what any of those numbers or letters stand for. Please help. Thanks.
the numbers and letters at the end are the laod and speed ratings for the tire. your first two tires are load range C the last tire is a load range E. 112R refers to the speed rating of the tire. if i remember right, an R speed rating has a top (constant) speed of about 115mph. Q is rated around 106mph. when i worked at a tire shop, we had all the different letters on a nice spreadsheet. i think those numbers are correct, if not, they should be close.
 
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