Presta jam nuts in bulk?
 

I'm ALWAYS losing the retaining nuts from Presta valves. I'd like to buy a bulk lot of them (like you can with cable housing ends & cable crimps), but I can't find anyone who sells them in bulk. Yes - I did Google them (and eBay, and Amazon, and Ali-Express), but unless I want to buy them by the ton, and I don't, I can't find any bulk sellers.

Any idea where to buy some?

Go to a local bike shop and ask them to save them for you. When they replace a tube they have both and old one and a new one. I am sure most just get thrown away or into a drawer. You don't really need them although I myself like to use them. Roger

How many do you need? If you PM me your address I'll mail however many I can find down in my workshop to you.

I can probably scrounge up a dozen of them. Yours for postage. I never use them.

I don't bother with them, what's their purpose?

Didn't want to scratch my rims, so i've got electrical tape only around the tube end. Looks nice and inline with my bike.

If you don't want to loose them again. Put 2 on each valve, and tighten them into each other.

They stop the valve going into the tyre, so you can get a pump on them with a flat. I don't use them.

Pretty simple.
If you don't want to use gawdawful long valve stems, they hold the stem while pumping up a flat.
More useful for deep rims.

I stopped using them years ago. I figure that if some inner tubes have valve stems that are not threaded, they can't be all that useful. As long as my valve stems are the correct length for the rim, I have never had any difficulty pumping up a new inner tube. The only place I use those nuts is on the valve stems of my tubeless wheels

LBS would have a Bin of leftovers from replacing Tubes .






Schwalbe uses ones with a widerflange to serve as an Adapter P/V>S/V & has a threaded Schrader &. dunlop/woods stem too

How are you losing them? Normally you spin them on after you replace the tube, then never touch them again. If they get loose, they can't "fall off" if you have a valve cap on. And you get a new one with each tube. I'd guess most of us have several laying around, if we don't throw them out.

"Valve caps" in my house are what goes in the trash when you fit a new inner tube.

They do make good spacers for mounting water bottle cages on small frames where the seat tube bosses straddle the front derailleur clamp. I also do use the locknuts on my tubes to keep the valves from rattling, and to help lock in the schraeder-presta adapter bushings on my wife's CX bike.

They shouldn't be used until after the tyre is pumped up. Using the nut before inflation can cause the bead to seat improperly because the tube is bolted to the bead. When I actually use them, I spin the nut on after inflation.

Screw on Pump heads Like Lezyne have different needs than Push on, Gasket heads like Silca.

Sew up tires dont need them because the tire(&tube) is Glued to the rim.

Presta Valve Nuts by Jobst Brandt

I, too, have a collection at home since each tube comes with one and I've never lost one off a bike (especially since I stopped using them altogether. :lol: )

That's ASSuming one screws them on tight before pumping the tube.
Most people have more sense.

So you can use the stem on a damaged tube for a tubeless system because Stans are silly expensive.

You wanna bet? I worked in an LBS for almost a decade and this was the number one cause of blowing the tyre off the rim. Customers would cinch the nut down and prevent the bead from seating, blamo. That's why I always put them on after inflation, they're just for show. All my pumps have clamp on heads, I don't see any need for it, never have.

And yes, I have three tubeless bikes with Stans valves, but that an entirely different scenario. I'm cheap, not using a Stans valve is a corner I wouldn't cut.

Don't care-

If your tubes have removable cores, there are many vendors who sell packages of replacements:

http://goo.gl/zERMXA

They prevent valve stem movement when you attach and remove a pump topping-off tires so the inner tube doesn't abrade where it meets the valve leading to an eventual blow-out.

I used to leave mine off because they didn't seem to do anything.

I started getting fewer flats when I moved to Continental tires with aramid breaker layers, and began patching instead of pitching which meant longer tube life.

With a couple of high-mileage tubes I got a failure at the valve stem in one, then the other in short order, thought about how it happened, and returned to using them.

I am able to put the pump head on without the nut, been doing it since 1975 when I was 13, Cenelli pumps with Campy heads. Too funny, some of you really struggle with simple tasks...

If the tube isn't between the tire and rim, why would snugging the nut even matter?

There's nothing wrong with using a presta valve jam nut(?) / lock ring as intended. The silliness is thinking that not using it is some kind of badge of honor.

LOL, can't imagine how you got to this. A useless item, defended to the point of questioning motives, that's "silliness" at its finest...