Most standard bicycles are tubed and we do not recommend using TireJect with tubed tires. Some high performance bicycles do have tubeless tires and TireJect could be used with tubeless bicycles tires. If you are not sure weather your bicycle tires are tubeless or not, then you probably have tubed tires and we do not recommend using our product (see "My tire has a tube, can I use TireJect?)."