To go one step further a metal valve cap has the same benefits, increases pressure retention (incase of a leaking valve core) and look a dam sight better in our opinion if you like that sort of thing. Another example might be 700 x 18-23c, which seems less obvious but 700c is the diameter of Road, Cyclocross, Adventure Road and Hybrid bike wheels, and the numbers relate to the width in millimetres, so 18mm-23mm wide. Inner tubes are normally made of butyl rubber or Latex, they sit inside your tyre and are inflated with a pump, they sometimes puncture but are easily replaced. Instead of having to lug around spare inner tubes with you, you can opt for a self-sealing inner tube.

Latex tubes have also been proven in multiple tests to have lower rolling resistance, making them faster.By pouring the sealant into the inner tube it is able to quickly seal small holes by drying and forming a clot over the hole when it comes into contact with the air.

Presta valves are often used on road bikes which run at higher tyre pressures as well as mid to high-end mountain bikes.These valves are often found on entry-level hybrid, mountain and kids bikes which run on lower tyre pressures.