Must be the weight. I have 15k on my MTR'S E range and they are half gone also. Thats why I'M looking for somthing else!puppy said:I have had very good luck with these tires until I put them on my SuperDuty. I was easily getting 50K on my 1/2 ton trucks. Put 265/75's on my SuperDuty and they are more than half gone at 20K. Gonna try something different next time.