The OP 's snake bites are cause by two things , 1 , his rim tape is too thin allowing the tubes to touch the nibbles when air is added , he need to use a thicker rim strip . (it need to be thicker , not wider or use a plastic strip ) . Or the Tape is moving and allowing the tubes and move back when he remove the tire . 2. Is cause by mounting of the tire error by using tools ( tires levers ) . Best to do without when all is possible Try putting air into the tube to shape it , put into tire , mount tire onto rim without tool and bring up to pressure .