Presta valves annoyingly fiddly

[thx1138]

Got a flat tyre on roadie the small portable pump doesn't push on it screws on. This same pump is fine with my schwabe mtb tyres

But with the pump on Presta setting every time I unscrewed pump, it removed the core and all the air wooshed out.

Anyway, I got another portable bicycle pump kicknig about that cllips on, so far so good, but it's rather bulky.

How do I stop these stupid valve thingies coming out?

[Ste]

Get a better pump that's less bulky.

[thx1138]

I just spent my money on a swanky new track pump

[Ste]

Go tubeless?

[ThunderGuts]

Having never come across this problem before, funnily enough the other weekend this happened to a friend while we were out cycling. I think the crux of the issue is a screw on type pump is, by definition, not a good design when it's screwing onto something that itself can come undone!

I'd get a new pump. I have a Road Morph G. Frame mount for it puts it in place of a bottle cage. Not particularly heavy, has a little flip out footstand (tiny but effective) and extendable hose. Clip on fitting to the valve like a track pump. Little in-line gauge and can pump to 120+ PSI so enough for road bike tyres. Had mine for years and years and it still works perfectly.
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TG.

[Easy-X]

This is why I like mountain bikes: Schrader valves or GTFO. If someone would care to inform me of the the superiority of Presta valves I'm all ears
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Nobby the Bastard]

I've never had an issue with any pumps with either type.

All our mountain bikes have Presta valves btw. Admittedly they all cost a least a grand new though.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Nobby the Bastard]

Smaller hole equals stronger rim.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Ste]

They are the boring reasons about stuff like presta valves are slightly easier to inflate, having a lockring on the valve is useful, they're better at high pressures than schrader valves and other such marginal differences but the real reason is that presta valves need a smaller hole drilled in the rim than schrader valves do.

I like Lezyne pumps for anything when a track pump can't be used. But as good as they are, tubeless is still preferable.

[mentalboy]

[Easy-X]

[Ste]

[Nobby the Bastard]

[weasley]

IIRC there’s a brand that’s notorious for this - Continental maybe?
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Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE

[stinkwheel]

Could you threadlock the core in? I can't remember EVER having a need to remove a presta valve core. in fact, I wasn't even aware they were removable. I think some of them aren't.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[RhynoCZ]

Last year, I got one of those mini pumps from Zefal with the lever mechanism and it works great. It fits in my ''tool bottle'' and can do 7 BAR (101.5 PSI), which is more than enough for my road bike.

I also carry one of those presta to schrader valve adaptors in my wallet, so I can use schrader valve pumps when needed. I got it manybe 20 years ago and still have it. Before I got the mini pump, this adaptor saved me many times and I still use it everynow and then. With this you can use whatever air pump.

This thing.
https://i.ebayimg.com/images/g/MDoAAOSw-YBXGx1E/s-l400.jpg
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[thx1138]

[Ste]

You could buy more inner tubes or you could go tubeless.

[thx1138]

[Ste]

You've got to get a fairly big puncture for the sealant to not immediately seal the hole!! But if are unlucky enough to get a puncture that's too big for the sealant then you've got several options.

You can use a tubeless repair kit thing that's similar to what would be used for motorcycle tyres. https://muc-off.com/products/puncture-plug-repair-kit

You can spend a bit more on that repair kit and get one that fits inside the ends of your handlebars. https://muc-off.com/products/stealth-tubeless-puncture-plug

Or if you're wanting to repair it quickly then something along the lines of this is much faster to use. https://www.notubes.com/dart With one of those and CO2 cartridges to reinflate the tyre, you should be going again before you even know it.

If you end up having to put a tube in then it's slightly messy because of the sealant in the tyre but they're all biodegradable or similar so the mess isn't going to do anything bad.

Once you've run tubeless, you won't go back to running tubes.

The fact your rims are drilled for schrader valves is a bit of a problem though.

[RhynoCZ]

[Zen Dog]

[Ste]

[stinkwheel]

I think you should just make life as fiddly and difficult as possible and fit tubs.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.