Poplar Bicycle tubes with popular design could give comfortable feeling during the riding process, high rubber content. Poplar Bicycle tubes with popular design could give comfortable feeling during the riding process, high rubber content.Sizes for folding bikes:8.5x2,8x2,9x2.50 10x2,10x2.125 200x50,255x50 280x65-203,280x50-203 12x1.50,12 1/2x2 1/4,12.5x2.25,12x1.75 14x1.50,14x1.75 16x1.50,16x1. ...