While I'm taking the approach that it's always best to fit the correct size, I'd like to either use, sell or give away these 700x25c tubes. They look like a cross between the two valves, with a wider lower section, like the Schrader, then a collar and a narrow top section, like the Presta. Suitable for, for example, 700x23C or ETRTO size 19/25-700 and fitted with a 48 mm high Presta valve.

PayPal Credit and PayPal Pay in 3 are trading names of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH. These are the same valves used on all motor vehicle tyres and are often referred to as ‘car type’ valves. The Cannondale Inner Tube 700x23c Presta Valve offers riders a quality inner tube for 700 x 23 millimetre tyres. To confuse matters further all tyres use the European Tyre and Rim Technical Organisation (ETRTO) system, so for a road, it would display 622 x nn with the nn value indicating the tyre width which is the same as 700 x nn.

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Presta valves are valves which have a slimmer stem, sometimes threaded to accept a locking ring, which holds it tight in the rim drilling. On bikes, Schrader valves tend to be used on lower pressure tyres, such as kids's bikes and mountain bikes. Carrying spares is always a good idea, even if you are running tubeless, as a large slash or hole will not seal easily. 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. We save this information so that you do not have to fill it in again each time and so that we can contact you in connection with the performance of the contract.I recycled my dad's road bike (about 20 years left in storage) so I bought a complete set of new wheels.