... during the riding process, high rubber content. Poplar Bicycle tubes with popular design could give comfortable feeling during the riding ... rubber content.Sizes for folding bikes:8.5x2,8x2,9x2.50 10x2,10x2.125 200x50,255x50 280x65-203,280x50-203 ... 1/4,12.5x2.25,12x1.75 14x1.50,14x1.75 16x1.50,16x1.75,18x1.75 20x1.75,20x1.95 ... /2.125 2.50-4,3.00-4These sizes could also be used ...