Have 3 of the 39x 13.5x 17 bfg. I believe they are the krt . I switched to 40 and have these laying around. They have pretty good tread. One with the best tread hold air. Other 2 have slow leak. If I remember right have to add air every week or so. 150 for all 3. If you want one other 2 come with it. Will not seperate. I will get some pictures.