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Discussion Starter · #1 ·
Just curious and i finally thought to ask. Do you need the nut that threads down a presta valve and tightens agains the rim?
 

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no. some argue it helps prevent rattling and makes it easier to pump up tires with low pressure and short valves... others argue just the opposite.
 

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turtle killer.
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I use unthreaded stems.. so.. nope! Same for the threaded spares... Only exception is on my tubeless setups, where the nut provides the needed pressure to seal the hole
 

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If you tighten the nut too tight you will tear the inner tube where the stem connects to it.

Either take off the nuts or leave them loose.
 

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I've been wondering the same thing since the last 3 flats I've had were small leaks right at the base of the valve stem. I never use the stem nut and maybe I push up too hard with the pump head. Think the stem nut might help keep the stem from pushing up.
Either that or stop buying crappy Specialized tubes. :)
 

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Is it the future yet?
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I use them. They DO keep the valve stems from rattling on my bike.
Plus they secure the stem while pumping them up too.
Do what works for you.
 

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How can a valve stem rattle when it has 100 + lbs of pressure pushing on it to hold it in place? I have never used the nuts in 30 years and was overjoyed when they invented threadless valve stems.
 

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Banned forever.....or not
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They make it easy to determine who the "noobs" are.
 

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Is it the future yet?
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How can a valve stem rattle when it has 100 + lbs of pressure pushing on it to hold it in place? I have never used the nuts in 30 years and was overjoyed when they invented threadless valve stems.
I don't know, but you're welcome to come ride my bike and tell me.
 

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Yes, if you have short valve stems, you probably at least want to take one along with you on a ride so you can get that initial pump of air in the tube following a repair. If you have long stems, you probably don't need one but if you do install them on, you will have to have them firmly tight to keep them from rattling. I use 50 -60cm length valves and don't need them except on my road tubeless wheels.
MarvinK said:
no. some argue it helps prevent rattling and makes it easier to pump up tires with low pressure and short valves... others argue just the opposite.
 

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Gas law.

siclmn said:
How can a valve stem rattle when it has 100 + lbs of pressure pushing on it to hold it in place?
It can rattle because it doesn't have 100 + lbs of pressure pushing on it. "100 lbs of pressure" means 100 lbs per square inch (psi). A valve stem is about 0.25" in diameter, making its area is Pi x r x r = 3.14 x 0.125 x 0.125 = 0.049 square inches. So at 100 psi, there's 100 x 0.049 = 4.9 lbs of pressure on a valve stem. That's not a whole lot of pressure, so it can rattle.
 

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Master debator.
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I don't use the nuts, heck I don't even use caps on my presta valves. Living on the edge, I know.
 

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I usually put a piece of plastic that covers the whole valve stem to keep it from rattling. Its a pain to put on, but I prefer it to the washer.
 

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I throw my nuts away!

Oh....er..wait...I didn't mea...
 
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