Tube Valve Length

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provoked
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Tube Valve Length

Postby provoked » Mon Oct 12, 2009 10:12 pm

Guys,

Looking at ordering some new tubes online, and was wondering whether I would have any issues with the 42mm valve on my deeper DT Swiss RR1.2s (30mm profile). The math makes sense, 42mm - 30mm = 12mm, but its cutting it close right?
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Re: Tube Valve Length

Postby mikesbytes » Mon Oct 12, 2009 10:19 pm

Go minimum 50mm, personally I'd go 60mm
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provoked
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Re: Tube Valve Length

Postby provoked » Mon Oct 12, 2009 10:24 pm

mikesbytes wrote:Go minimum 50mm, personally I'd go 60mm


Thanks Mike. The 10 Quantity only has 42mm, so I need to either a) Wait, or b) Buy These?
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Rockford
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Re: Tube Valve Length

Postby Rockford » Mon Oct 12, 2009 10:32 pm

You generally want around 30mm more than the rim to make it comfortable to maintain.
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black4tress
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Re: Tube Valve Length

Postby black4tress » Tue Oct 13, 2009 7:40 am

You'll prob find that with only 12mm you will have problems trying to attach the nozzle from the pump to the valve.
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Re: Tube Valve Length

Postby VicMic » Tue Oct 13, 2009 8:38 am

Not intending to hijack this thread, but,........

Is there a differnce between a valve stem with a thread and small screw-plate, and a completely smooth one. I have the threaded ones on my bike, purchased a spare tube and the vlave is smooth (and a bit longer).

Is there an advantage to either?

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jasimon
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Re: Tube Valve Length

Postby jasimon » Tue Oct 13, 2009 8:52 am

The advantage of the threaded stem with screw is that when pumping them up from flat you've got something that will hold the stem in place. When inflated it makes no difference whatsoever because the air pressure will hold the valve in place. (It also isn't that difficult to pump up a flat tube without a nut unless your valve stems are woefully short and your rims amazingly deep.)

The advantage of the smooth ones is that they don't have a little nut to rattle and drive you crazy and get too loose or too tight. Also, it is easier to get a seal on the smooth ones with your pump head.

Opinion seems to favour the smooth ones.

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Re: Tube Valve Length

Postby jacks1071 » Tue Oct 13, 2009 1:46 pm

provoked wrote:Guys,

Looking at ordering some new tubes online, and was wondering whether I would have any issues with the 42mm valve on my deeper DT Swiss RR1.2s (30mm profile). The math makes sense, 42mm - 30mm = 12mm, but its cutting it close right?


You will have no problem with a 42mm valve on a 30mm rim profile. If you can get longer ones for the same price then by all means get longer but you don't need them longer so if it costs more for longer - save your money.
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Re: Tube Valve Length

Postby Aushiker » Tue Oct 13, 2009 3:49 pm

black4tress wrote:You'll prob find that with only 12mm you will have problems trying to attach the nozzle from the pump to the valve.


Hi

+1 Been there done that. Not a good look on a wet cold night.

Andrew

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