ER-12/13 premium Korean made universal tube. Can be used in either radial or bias tires. TR13 stem use a B6 valve stem adapter bushing on the stem if your wheel is drilled with the larger 5/8" stem hole.
Tube will be identified with: ER12/13
Tube fits ALL of the following sizes: 5.50-12, 5.60-12, 5.70-12, 6-12, 6.00-12, 6.5/80-12, 7-12, A78-12, B78-12, 135R12, 145R12, 155R12, 155/80R12, 5.00-13, 5.20-13, 5.60-13, 5.90-13, 145R13, 155R13, 165R13, 145/80R13, 155/80R13, 165/65R13, 165/70R13, 185/60R13, 195/60R13, 175/60R14.