Welcome,RandyJH!! It appears that your (rear) tires are 9:00X20:00's. The stock rims should accomodate 7:50-9:00's as long as they're 20:00's. Steering clearances will be affected by the 9:00's,though.I use 8:25's for my front tires,and nothing rubs. 7:50's on the front look too small,for the wheel opening,for my taste.
