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Triathlon Tires Presta Valve What Size? (Solution)

Although some pro triathletes may run a different sized tire depending on the race and conditions, in most cases, professional triathletes and time trialists will run between 21 and 23mm tires. In most cases, triathletes will use 23mm tires with a high PSI.

What is the standard Presta valve size?

Presta valves are often available in 40, 48 and 60mm lengths. If you have a deep-dish rim you will need to be sure the valve you are purchasing is long enough to attach your pump properly. The valve stem length will often be mentioned after the valve type if it is a Presta.

Are there different size Presta valves?

Presta valve inner tubes are available from a range of makers with valve lengths up to 80mm. There’s no harm in using a valve longer than you need, although it might look a bit odd to use a particularly long valve on shallow wheels.

Are Presta and Schrader valves the same diameter?

As far as the bike’s wheels go, the only difference between a wheel designed for Shrader valves and one designed for Presta valves is the size of the valve hole in the rim. Schrader valves measure 8mm in diameter. Presta valves measure 6mm in diameter.

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What does 700x25c mean?

700x25c indicates a tire with a 700mm outer diameter and a 25mm width. A third type of tire size might appear on either a mountain or a road tire: 25-622 is the International Standardization Organization (ISO) way of identifying the 700x25c tire in the example above.

How do I know what size valve I need?

The first number is the width of the inflated tyre, while the second is its inner diameter. For instance, 700c x 23 becomes 23-622. Know these two numbers along with your valve type and any decent bike shop will get you the right tube.

Will a 700c tube fit a 28?

Many 700c tubes come to fit tyres up to 25mm, which are often fitted to road bikes. But you can also find wider tubes to fit the 28mm tyres that are increasingly fitted to road bikes.

IS 700c the same as 29?

29″ (ISO size 622) is actually the same rim diameter as 700C, although most 29″ tires will not fit 700C road rims because they’re too wide. 29″ tires are popular with mountain bikers; search for 29″ MTB. 650B (ISO size 584) is used for some randonneur bikes and other specialized bikes.

Is 27.5 the same as 700c?

Just as a 700C wheel is the same diameter as a 29” (29er) wheel, 650B shares the exact same rim diameter as 27.5”. 27.5”/650B rims have a bead seat diameter of 584mm, and 29”/700C rims have a bead seat diameter of 622mm.

Are all tubeless valves the same size?

Sure, tubeless valves come in different materials, lengths and colors, but even bore diameters vary greatly, which can impact the speed and volume of the blast of air from your compressor or charging pump.

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What size valve stem for tubeless mountain bike?

The valve stem of 40mm length works well in most mountain or road bikes. However, for 50mm rims, you require either 60mm or 80mm valve stems.

Are tubeless valves Universal?

These tubeless valves are universal and have also been designed to work with tubeless tyre inserts. Each valve has a removable core allowing you to get maximum air flow from your tubeless pump or CO2 cartridge.

Can you fit a Schrader valve in a Presta rim?

You can put a Presta-specific tube in a rim drilled for Schrader valves, but it’s not advisable for anything more than an emergency fix. Meanwhile, the only way to put a Schrader tube in a Presta-drilled rim is to widen the valve hole —something we don’t recommend, as it may compromise the rim’s integrity.

Why do road bikes use Presta valves?

Presta valves are more commonly used because they are narrower, and therefore require a narrower hole in the rim, and the valve hole is the weakest part of the rim. Presta valves also take a higher pressure, which is commonly used in road bike tires.

Do you need a special pump for a Presta valve?

To inflate a Presta valve you’ll need a regular air pump and a special adapter. The adapter effectively converts your Presta valve to a Schrader valve so that you can use a traditional air pump to inflate it. Attach your air pump and inflate the tire to the recommended pressure.

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