Presta valve snapped off

[272BHP]

This has just happened twice in two days now.

Unscrewed the valve to pump the tyre up and the valve has snapped off. Today pumped up the rear tyre and the same thing happened. I haven't got time to buy a new tyre till tomorrow evening now.

Rear tyre pumped up ok before the valve sheared off so the tyre is still fully inflated - will it be ok to ride tomorrow?

[272BHP]

Of course, yes I meant the locknut. It seems to be staying up ok so I will use it tomorrow.

Cheers

[272BHP]

I use a track pump. I will just try and be a bit gentler with it I think and see how I get on.