Trans American 7.50R16 Inner Tube with TR13 Valve Stem Quality Trans American 7.50R16 inner tube for light trucks. TR-13 valve stem fits most light truck applications. Fits Sizes: 7.00R16 7.50R16 215/75R16 215/85R16. For use in radial or bias tires. 235/75R16 235/85R15 245/75R16 245/85R16.