Valve Types

[martin007]

Hi!

I´m collecting information about the valves types.

* Schrader valve. > https://en.wikipedia.org/wiki/Schrader_valve

* Dunlop valve. > https://en.wikipedia.org/wiki/Dunlop_valve

* Presta valve. > https://en.wikipedia.org/wiki/Presta_valve

[Burgerman]

Theres only really one type used on cares, motorcycles. But theres been a few on bicycles. Because of weight etc.

[martin007]

All the powerchairs I know have Schrader valves.


And you?

[Burgerman]

Yes. Because all the others are for racing bicycles.

[ex-Gooserider]

NEVER seen a "Dunlop Valve" in the US.

There are some pedal bikes that use Presta valves, mostly either speed racer types, or some of the EU import types - Seems the more you pay the more likely you are to get a Presta valve as part of the package...

I have also seen Presta valves on some Manual Wheelchairs - mostly the ones going for ultra high pressure, skinny tires which some claim are lower rolling resistance, and lighter.

(Interestingly though, most sites say that while bigger tires are heavier, and offer more air resistance at high speed, they have the same rolling resistance if properly inflated, and give a better ride)

Everything else, cars, motorcycles, most chairs, trucks, etc. uses Schrader valves.

There are some big agro / industrial off-road tires that use liquid filled tires for ballast, and those often have a sort of hybrid valve with a big lower plug for easily filling the tire with fluid, and then a Schrader on top for air...

[martin007]

schrader.jpg (18.84 KiB) Viewed 1342 times

Schrader valves can be divided into 2 groups: AV and SV.


*AV

AV.jpg (12.2 KiB) Viewed 1342 times

* SV

SV.jpg (28.76 KiB) Viewed 1342 times

[martin007]

SV valves depending on the angle.


SV 90/90

SV-90-90.jpg (32.64 KiB) Viewed 1330 times

SV 90/45

SV-90-45.jpg (27.91 KiB) Viewed 1329 times

[martin007]

SV 45/45

SV-45-45.jpg (29.44 KiB) Viewed 1326 times

SV 90/30

SV-90-30.jpg (31.14 KiB) Viewed 1324 times