TWO New Premium 20.5x8.0-10 Trailer Tire Inner Tubes 20.5x8.00-10 Two new premium quality Korean made tubes (not cheap chinese) for use in the 20.5x8.00-10 or 205/65-10 trailer tires. These tubes have the common TR13 straight stem that is made on the tube offset to one side and are for highway use tires.