Tire and tube exchange of GIOS MIGNON

I decided to change a rear tire and a tube because it went flat again although it went flat before and repaired it. The thickness of the tire became 26.5mm from 30mm and became the looks that was clear-cut and fearless.It is a memorandum as follows.

Tube SCHWALBE 20 X 1-1/8(451)
Tire SCHWALBE Durano 20 X 1-1/8(28-451)