My buddy called me up yesterday and told me he had some 31"s hanging around that I could have for free. The tires are pro-comp all terrains, and they look almost brand new.

Heres the bad news though:
They are already mounted and balanced on s10 wheels, So I would have to break the bead and remove them if I wanted to put them on my Ranger.

Is this something I can do myself, or would it be better to have it done professionally on a machine??

The tires are also mismatched sizes....the width on the back two is 12" and the front is the regular 10.5". Would having that monster 12 inch width on my rear end be okay???

 

you will have to change the tire off the s10 rim but its easiest to get it done with a machine. if you have friend with one you can do that and get them balanced again and the width i cant help you on but i wouldnt run them. id take them and buy 4 new tires 2 10.5's and 2 12's then have 2 sets for the price of one