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Is the metal ring that screws onto the tube stem(6 posts)

Is the metal ring that screws onto the tube stemballbite
Jun 15, 2003 4:06 PM
necessary? I have always screwed them tight against the rim but a guy I rode with today said they are totally unnecessary. Was he right?
... here's what Sheldon says...Akirasho
Jun 15, 2003 4:19 PM
http://www.sheldonbrown.com/gloss_p.html#presta

I forego the lockring on most wheels... except for a couple MTBs... the same safety argument may apply to clinchers... but they rarely experience a catastrophic failure that would make it an issue...

Be the bike.
They do more good than harm...BergMann
Jun 15, 2003 7:03 PM
Depends on your pump head.
I personally like having them on there because it prevents tubes from diving down into the rim when the pressure is real low (esp. on MTBs).

Another MTB issue: do a lot of mud riding/stream crossings? THe lockrings help keep gunk out of your rim.

Also, it is a good thing to hold onto when removing the pump head from the valve stem if the head doesn't have a release lever.

In the end it's mainly about how you handle your tubes: if you're constantly yanking and ganking on the valve stems, they will simply tear right out of the tube -- lockring or no lockring.
The only reason to use themrussw19
Jun 15, 2003 10:46 PM
If your rim is drilled for Schraeder valve tubes, then use the locknut or rim grommets. It will keep your valve stem from floating around in the hole. If you rims are only drilled for presta tubes, you don't need to use them. You really don't need to use the valve caps either because the valve has it's own closing nut. On Schraeder tubes the valve cover is there to keep dirt out of the valve opening, but on presta tubes, it's also unnecessary.

But the upside is that they add like 3 grams if you really want to use them, so they certainly don't hurt.

Russ
my stems aren't threadedterry b
Jun 16, 2003 7:36 AM
the stems on the tubes I use are not threaded, so they have no little nut. they work fine and I've never ruined a tube so it might be safe to extrapolate that you can throw them away.
I've used bothbrider
Jun 16, 2003 9:49 AM
Have both threaded and smooth. Function the same to me. Never used the ring. Dead weight in my book.