Jerry said it right...Take your split rims to a pro...They are incredibily dangerous!!!!...I have repaired everything from 15in to 10.00 x 20..and if you don't know what you're doing you can get yourself killed...Many a man has lost his life from split rims blowing off!!!...Thats why you will see this really heavy duty cage at the tire shops..They are for airing up truck tires and wiil spare you if something goes wrong....I lived on the edge for years..Took many chances..BUT..I was lucky...I used to lift my lube rack and lay it on the split rims to air them up...Had on old International wheel blow apart that sent me into the wall...I'm sure glad I don't have to deal with them anymore...I put modern wheels on my old Chevy trucks when I can..Do yourself a favor...Take em to the local tire guys...Al..