The 20-inch BBB (BTI-21) with car nipple Shrader is suitable for children's and teenage bicycles. Made with the addition of rubber the BBB is more resilient than its counterparts allowing it to better withstand impacts and keep air in the middle. BBB Innertube (20 X 1.75/2.125 Av) camera is perfectly repairable due to its greater elasticity the adhesive strips hold tight thereby prolonging the life of the camera.