Why do presto valves exist?

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youngoldbloke

The older I get, the faster I used to be ...
I use Michelin tubes which are have unthreaded bodies anyway. In the past I have had a number of Continental tubes fail at the valve/tube junction, even with the nut in place. Perhaps it is a manufacturing issue more than anything. Schrader valves seem to manage without a retaining nut too.
 

Peteaud

Veteran
Location
South Somerset
This thread is older than most of my tubes.
 

pawl

Legendary Member
Are you using alonger than normal valve.Dont forget they come in various lengths for various rim depths.Along valve on a shallow rim can be very flexible.
 

billy1561

BB wrecker
I find without using the nut i get a rattle noise so i generally put the nut on when i don't drop it and lose the thing.
 
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