carld
Senior Member
In the spring of 2014 I purchased two LT265/75R16 E rated tires to replace only the back the stock P245/70R16 tires and kept the stock tires on the front. I drove about 7000 miles in 2014 and realized I had made a big mistake (can't put it in 4 wheel drive with different size tires). So in 2015 I got three more LT265/75R16 E tires for the back and the spare. Since then I've driven another 10000 miles. The tires have very little wear on the order 0.1 inch in tread depth. Bottom line is I have the following situation:
17kmi (front) 45 psi
10k mi (back) 50 psi
0 mi (spare) 50 psi
Doing the math, I can equalize the miles in 4 rotations after driving 17k mi twice and 10k mi twice. Starting out I switched the 10k pair to the front and 17k to the back and then switched the 0 mi spare with the drivers side 17k, since the camper weight is mostly on the rear driver side.
Miles Driven: 0 17k 17k 10k 10k
Drivers Front: 10k 27k 34k 44k 54k
Pasngr Front: 10k 27k 34k 44k 54k
Drivers Back: 0 17k 34k 44k 54k
Pasngr Back: 17k 17k 44k 44k 54k
Spare: 17k 34k 44k 54k 54k
I’m at 0 miles driven and headed to Alaska on May 1, a round trip 10k miles. I put 45 psi in the two front tires, and then to help equalize the rolling diameters for the mismatched rear tires, I put 50 psi in the 17k and 45 psi in the 0. A test drive on the highway feels very stable.
17kmi (front) 45 psi
10k mi (back) 50 psi
0 mi (spare) 50 psi
Doing the math, I can equalize the miles in 4 rotations after driving 17k mi twice and 10k mi twice. Starting out I switched the 10k pair to the front and 17k to the back and then switched the 0 mi spare with the drivers side 17k, since the camper weight is mostly on the rear driver side.
Miles Driven: 0 17k 17k 10k 10k
Drivers Front: 10k 27k 34k 44k 54k
Pasngr Front: 10k 27k 34k 44k 54k
Drivers Back: 0 17k 34k 44k 54k
Pasngr Back: 17k 17k 44k 44k 54k
Spare: 17k 34k 44k 54k 54k
I’m at 0 miles driven and headed to Alaska on May 1, a round trip 10k miles. I put 45 psi in the two front tires, and then to help equalize the rolling diameters for the mismatched rear tires, I put 50 psi in the 17k and 45 psi in the 0. A test drive on the highway feels very stable.