Snapping schwalbe valves

[Tin Pot]

Lost commute/training session today due to yet another snapped valve.

I use a Joe Blow pump.

How do I stop this happening? More expensive tubes or am I doing something wrong?

 

[alicat]

Time for N+1 so you can use another bike when it happens.

I don't think they come more expensive/better made than Schwalbe!

S**t happens. Just take it more slowly/carefully when you insert the hose into the valve. Or chalk it up to experience.

 

[steveindenmark]

I agree with Alicat. It does sound like user error.

All my bikes have Schwalbe tubes and Ive never snapped a valve.

At what stage does it snap?

 

[Levo-Lon]

I'd agree with above,little less vigorous pumping..

 

[mjr]

Which pump? Ones where a hose connects to the valve are much better than ones that connect directly.

 

[Tin Pot]

It's a Joe Blow yellow one:
http://www.wiggle.co.uk/topeak-joe-...|pcrid|71714699822|pkw||pmt||prd|5360103024uk

1. Unscrew the valve bit of the inner tube
2. Put the grey bit of the pump on the valve and press the yellow lever down to clamp it on
3. Pump to 110/120 (right for me)
4. Release clamp
5. Pull off grey bit (usually a bit of hissing and sometimes doesn't come off cleanly)
6. Screw up valve bit
7. Rock n roll

 

[Levo-Lon]

It's a Joe Blow yellow one:
http://www.wiggle.co.uk/topeak-joe-blow-sport-ii-track-pump/?lang=en&curr=GBP&dest=1&sku=5360103024&ci_src=18615224&ci_sku=5360103024uk&utm_source=google&utm_term&utm_campaign=UK_PLA_Accessories&utm_medium=base&utm_content=sblbVqdjF_dm|pcrid|71714699822|pkw||pmt||prd|5360103024uk

1. Unscrew the valve bit of the inner tube
2. Put the grey bit of the pump on the valve and press the yellow lever down to clamp it on
3. Pump to 110/120 (right for me)
4. Release clamp
5. Pull off grey bit (usually a bit of hissing and sometimes doesn't come off cleanly)
6. Screw up valve bit
7. Rock n roll

ohh right,id have bet my house you were using a small hand pump...
ive never had this happen and struggling to think why it has snapped.
odd, all i can sugest is your applying side stress to the valve connecting or on realease? When operating the lever

 

[Tin Pot]

I was in a bit of a rush this morning, and I realise it might not be clear that I mean hey are Schwalbe inner tubes with the usual road bike Presta valves, not the old school Shrader chunky valves.

 

[Racing roadkill]

I've only ever snapped a valve when I was pumping too hard, with a rigid tool.

 

[roadrash]

I've only ever snapped a valve when I was pumping too hard, with a rigid tool.

calling @Fnaar

 

[Dommo]

I use the same pump and have had plenty of Schwalbe tubes and I've never damaged a valve in that manner. I certainly have when hammering away in an angry manner with a small handpump on the roadside, but never with the track pump. I guess you're being a bit rough with it? When does it break? When you're disengaging or whilst pumping?

 

[ColinJ]

How do I stop this happening? More expensive tubes or am I doing something wrong?

Well, unless you have bought several tubes from a bad batch, then yes, you are doing something wrong!

So, what could you be doing wrong ...

• Damaging where the valve attaches to the tube by pushing the valve into the tube when attaching the 'grey bit'? (The little threaded collar round the base of most valves should prevent that.)
• Damaging where the valve attaches to the tube by pulling the valve out of the tube when removing the grey bit. (Hold the valve to stop it moving.)
• Damaging where the valve attaches to the tube by pushing the valve sideways when attaching or removing the grey bit. (Hold the valve to stop it moving.)
• Not lining the valve up properly with the hole in the rim so the rim is pulling the valve sideways?
• Damaging the screw end of the valve somehow by clumsy use of the pump?

Where is the valve 'snapped' - at the base where it is attached to the tube, on the shaft of the valve, or the knurled bit you screw open/closed?

 

[byegad]

I've snapped several Prestas, not just on Schwalbe tubes. One of my trikes came with Prestas and the first thing I did was ream out the hole for car style valves. Another came with Car style valves from new and the third one has aero rims and Prestas, and you can't drill those out otherwise you risk the valve base bridging the inside and the tube ballooning either side of the valve and blowing at odd times! (I found that one out the hard way on a Dahon bike some 10+ years ago!) I'm always ultra cautious with those Prestas and so far haven't snapped one, but I much prefer the clunky car style valves.

 

[Tin Pot]

Well, unless you have bought several tubes from a bad batch, then yes, you are doing something wrong!

So, what could you be doing wrong ...

• Damaging where the valve attaches to the tube by pushing the valve into the tube when attaching the 'grey bit'? (The little threaded collar round the base of most valves should prevent that.)
• Damaging where the valve attaches to the tube by pulling the valve out of the tube when removing the grey bit. (Hold the valve to stop it moving.)
• Damaging where the valve attaches to the tube by pushing the valve sideways when attaching or removing the grey bit. (Hold the valve to stop it moving.)
• Not lining the valve up properly with the hole in the rim so the rim is pulling the valve sideways?
• Damaging the screw end of the valve somehow by clumsy use of the pump?

Where is the valve 'snapped' - at the base where it is attached to the tube, on the shaft of the valve, or the knurled bit you screw open/closed?

Cheers, I'll take a pic when I get home.

It's not the first, I have the collar on.
Could be the last.

How much air should escape when you're removing it, and should there be any resistance at all?

What does tightening the grey bit do? I do t adjust this at all.

Bought a new conti tube to replace it with...

 

[Tin Pot]

I use the same pump and have had plenty of Schwalbe tubes and I've never damaged a valve in that manner. I certainly have when hammering away in an angry manner with a small handpump on the roadside, but never with the track pump. I guess you're being a bit rough with it? When does it break? When you're disengaging or whilst pumping?

Disengaging.

Ive had the tip of the valve go wobbly or fall off and replaced the tube before it got unusable.

This time it snapped half way down and dumps the whole air volume when disengaging.