Thinner and more flexible for lower rolling resistance, but they lose air pressure quickly and require daily topping up.
Commonly 26" , 27.5" (650b) , or 29" diameters. Widths range from 1.75" to 2.4" or more. 2. Identify the Valve Type where to buy bike inner tubes
The best option if you need expert advice on sizing or want immediate professional installation. Thinner and more flexible for lower rolling resistance,