In terms of bang for buck, the humble inner tube is arguably the best value in cycling. For less than $10 you get a piece of equipment that is critical to the operation of your bike - unless you're running tubeless of course. But which tube is the right tube for you? You'd think that's an easy question to answer, but with the increasing variance of rim widths, rim depths and tire sizes on the market today, picking the right tube actually requires some thought. The gang from the Global Cycling Network is here to help you think it through. Have a look.