I can't see any valve design not being susceptible to tubeless spluff
milKit valves are
never had a problem with them, been tubeless since stans first came out and with years of spaffage and sticky substances haven't had a gummed up presta or one unscrew on me.
some of you lot must be seriously heavy handed clumsy buggers, I'd hate to think how you handle your partners "delicate bits" it would either be like someone with parkisons trying to unblock a sink, or a fat fingered toddler ramming toast in a cd player
Nope, never
Nope, never
Nope, never
This thread is proof that some folk should never attempt bicycle maintenance.
That, basically.
It's Conti tubes that are the issue
I use Conti tubes almost exclusively.
Never had an issue.
For years I ran Schrader valves as i found them easier in use (can use a car tyre inflate or garage tyre pump :-)).
Can get a tiny adapter thing that will let you use a garage pump on a presta too.
I'd be happier if schrader valves were consigned to history. Ugly things.
hear, hear!
Had far too many standards proliferation, don't want yet another one for something that is not broken.
I use Conti tubes almost exclusively.
Never had an issue.
*swoon*.
But presta valves are broken. They have no advantage over Schrader valves except for on narrow road rims. Irrelevant to whether you have broken a presta valve many have.
We have two common valve systems. One works perfectly all the time for all people, the other is fine some of the time but not always. Surely the first one should win that battle and become the only standard? How on earth is it ugly, and even if were, which it really isn't, does that matter?
For balance.
Presta I have experienced...
- Clogging with tubeless goo occasionally (solution: usually when I should have replaced the goo and valve a month before but been too busy or lazy or the bike has sat for a couple of weeks with valves down the bottom of the wheel and it pools around them)
- Tubeless goo and a bit of gunge causing the top bit to be so tight the core unscrewed instead and required pliers and a gas cannister to resolve (don't mock my heavy camelback!) (solution: see above)
- bending the tip (usually when tired and a bit cack handed/cold hands in the dark)
- the core unscrewing after a threaded CO2 inflator had frozen onto the valve. (Use a push on inflator or accept it happens once every few years)
Schrader clogs too (BMX tube ghetto tubeless).
I've not really had issues getting enough air through for tubeless.
They don't really bother me.
They get gunked up from time to time but it takes about 30 seconds to shop the core out and remove the dried sealant. I have bent a few all with hand pumps.
I presume people think it's only Presta which clogs with sealant because they've only tried Presta with sealant?
aracer - Member
I presume people think it's only Presta which clogs with sealant because they've only tried Presta with sealant?
Indeed, I had schraeder clog with sealant and it was much more of an issue, couldn't get it unclogged at all, had to use another valve core, in which the spring had broken, so I had to use a third after a lot of confusion about why my tyres weren't holding air.
Presta valve cores coming loose? Tighten with a piece of chain - the wide bit fits perfectly. Usually have a few links lying about from new chains.
Always done Presta for road, Schrader for MTB, never had any problems with either.
Presta is too delicate for MTB and there aren't any advanatages in using it for MTB, but is ideal for road as its easier to get higher pressures in.
Mind you, saying that, I did used to run 120psi in my BMX tyres when riding flatland...... 😯
Unscrewing valves is a pump problem, how people defended the Lezynes that had that fault I have no idea, they even started selling people a part to fix it... It doesn't happen with good pumps, unless the valve was untight.
Clogging, yep, happens- but the valve core costs basically nothing and changes in 2 seconds.
I do still prefer schrader, I don't see what presta is supposed to do better other than having a smaller hole in the rim... But it's fine.
And the fact that schrader and presta are massively well established standards that work perfectly well is exactly why we can expect to see them replaced with something totally incompatible within the next few years 😆
Perhaps you could make a Presta valve with the core using a reverse threat , that way you could unscrew the top of the valve safely , pump up the tyre and then when you tightened it down the whole thing would come unscrewed 😀 FWIW I have not had any of the valve core unscrewing problems because I make sure they are done up tight and before I put the valve cap over the valve I put a drop of oil in it which lubricates the top of the valve making it easy to turn . I have had the occasional gumming up with sealant issue but a couple of valve cores cost virtually nothing . I was much more upset when Stans gunked up my rather expensive digital pressure gage .
If you have a multitool with various sized tools for adjusting spoke nipples you should find one thats close enough to tighten a loose presta core, hence no need to carry a additional tool.
I can kind of see that Presta is not ideal but when I think about the bikes in our house the valves are not anywhere near the top of the ballache list. They're sort of down there with bar tape and bottle cages for me. Yes, there's probably a better way but meh.
How about making a Schraeder design valve but the width of a Presta? Best of both worlds.
Mind you I'm saying this as a Presta user with two Lezyne pumps and I've never had the core unscrew or snap ever.
If you have a multitool with various sized tools for adjusting spoke nipples you should find one thats close enough to tighten a loose presta core, hence no need to carry a additional tool.
I mean, seriously - the thing is the size of my thumbnail! It really isn't a hardship to carry. Personally, I keep it in a small "TipTop" box with puncture repair kit, spare brake pads, chain links and other essential, but tiny bits and pieces. The whole lot lives in a small neoprene pouch with my CO2 and inflator head, so I only need to grab one thing when I head out.
FYI, I use [url= https://www.topeak.com/global/en/products/Mini-Tools/340-mini20pro_gold ]this tool[/url] and it doesn't have a valve tightening tool on it that I can see. It's bloomin' small though and has pretty much everything else 🙂
Nothing wrong with Prestas.
Until you try to work on them in subzero when your fingers are numb sausages.
They're perfect for road bikes IMO, but for mtb I prefer Schrader.
Glad I'm not alone in my hatred of presta valves!
I'm with you. They are just utter bobbins. Schrader are so much better. Chunky and robust.
AH! I've just remembered another reason Presta are s**t - ****ing valve caps! - other than some Schwalbe examples which are made of a tougher plastic they seem to be universally made of the softest, cheesiest plastic known to man and I never fail to strip the thread doing them up even under the most minuscule amount of torque.
This thread has inspired me - Does anyone make alloy Schrader valves?
[quote=newrobdob ]Presta is too delicate for [s]MTB[/s] the hamfisted
Fixed - can't say I've noticed differing requirements in robustness of valves between road and MTB - you don't tend to get rockstrikes on your valve.
[quote=Speeder ]AH! I've just remembered another reason Presta are s**t - ****ing valve caps!
and right there we have the advantage of Presta over Schrader - you don't need to use a valve cap with Presta valves.
Valve caps?
I lose them the first time I take them off - whether Presta or Schrader.
There's no caps on any of my bikes nor, indeed, my car
I have had the same issue with my otherwise excellent Lezyne pump and presta valves. Usually, I have reasonably good fine motor skills and a lot of experience working on bikes - so I don't think it's ham-fistedness.
I'd hate to think how you handle your partners "delicate bits"
I'd hate you to think about how I handle my partners "delicate bits" too. Whatever gets you off though...
FYI, I use this tool and it doesn't have a valve tightening tool on it that I can see. It's bloomin' small though and has pretty much everything else
one of the spoke wrench things on the chain breaker part just happens to be the right size to be a presta valve core tightening tool
for schraeder, you;d need a dedicated valve remover tool if you needed to squirt in a bit more jiz while out on the trails. I'm not aware of on any on a multitool (but I'm sure someone will demonstrate that there is one)
and take a presta cheese valve cap, cut the tip off, and you have a free presta to carvalve adapter
I'll stick to presta. More bases covered in one valve than any other.
Designs should be robust and have some idiot-proofness. Or, for "idiot" read cold hands dark night. Neither design is perfect from this point of view, so there is room for improvement. The improvement wouldn't result in an extra "standard" if it was compatible with either of the current valve hole sizes and current pumps would attach to it.
andytherocketeer - Member
...for schraeder, you;d need a dedicated valve remover tool if you needed to squirt in a bit more jiz while out on the trails...
No you don't.
[url= http://www.towsure.com/metal-schrader-valve-cap-with-core-remover?gclid=Cj0KCQjw557NBRC9ARIsAHJvVVNzCQ8t1UH_n5EFGCSUkOLH32-zj5bTZiQi0fF5QToEK8sOM4fEk1IaAiWOEALw_wcB ]There's metal valve caps with a valve core remover so it's always right where you need it.[/url]
[img] 
[/img]
My bikes with Schraeder valves all wear these. They also usually have a seal, so even if your valve leaks, they retain the air.
andytherocketeer - Member
...if you needed to squirt in a bit more jizz while out on the trails
You what? 😯 🙄 😆
No you don't.
Do those come as standard valve caps on reputable Schraeder tubeless valves and reputable Schraeder tubes with removable cores? (clearly cheapo ebay specials probably won't)
Or were they a dedicated aftermarket tool purchase that comes in a rather handy form factor?
andytherocketeer - Member
Do those come as standard valve caps on reputable Schraeder tubeless valves and reputable Schraeder...
They have been around for at least 60 years I know off. There used to be at least one fitted to some new cars.
Halfords or any car accessory place will have them in packs of 4 (or your local car tyre store).
