559 rim

Where To Buy New Nylon 57-559 26X2.125 Bike Tires? CST C727 Bicycle Tire – 26 x 2.125 (57-559) – Black – 31-735. What does 559 mean on a bike tire? 1 (54-559), which denotes a tire with 26 inches in diameter (559 mm) and the width of 2.1 inch (54 mm). Other accepted measure is