I've never seen that trick done! The tube will fit the new tires just fine, but you'll really need to remove the tube "carefully" in order to mount the new tire. You may not need tire tools at all to remove and mount the tire. It just depends on the makeup of the tire, stiff or flexible compound material. The tube can be used quite awhile as long as it is removed and installed carefully when using tire tools ( if a tool is needed at all ). Use proper tire tools ( no screw drivers! ). Put one side of the tire on, then with the tube partially inflated and coated with powder to keep it "slick" inside the tire so the tube can be adjusted as required to align with the rim's valve stem hole, place the tube inside the tire carefully making sure the tube isn't pinched between the tire and rim when placing the second side of the tire onto the rim.