Is your goal to buy 4 x 35’s and save $300 keeping the spare 33? I would think the $300 is small potatoes considering the possibilities of what could go wrong having a wrong size spare tire…..I ain't got 35s yet. Wearing out 33s now.
Still have 33 new one spare. Was lazy to include it into rotation earlier .
Thank you. I was just assuming I could do it, but its not worth it. Will buy a set of 5 tires 35s when the time comes. Thank youAccurately measure your 33 inch (loaded) spare from center to the ground with 40 psi. Deflate the 35's till they match. Disregard any thought of the tire diameter. Your only concern is the loaded radius.
When the distance is equal, your loaded radius will be the same. Keep your speed down and replace that spare ASAP. "Not next week". Better yet, find a used 35 tire for a spare or a set of 5 used 35's if you budget won't allow 5 new ones.
I did this on one of my trucks years ago to save a few bucks. I had aggressive A/T tires on the truck but didn't want to use a spare that was too small. I also didn't really have an extra $300 to hang under the truck, so I bought a used all season tire of a similar size it stuck it under there. I got the tire for something like $100 and didn't have to worry about messing up the LSD with a smaller size or having to rotate a flat to the front before limping to the tire shop......., find a used 35 tire for a spare ....