Had a nasty experience last week where, on checking the air pressure in my front tyre at a service station using their hose with lance attachment , the valve broke and the tyre immediately lost all pressure.
Fortunately was only about 200 metres from home and idling , slipping the clutch and fighting the front wheel managed to get home.
Checked on the internet and found that the valve is available as a separate part but at a cost of 35 Euro's as it is specially made to fit into the tyre pressure sensor. Decided to take the wheel off and take it in but then needed to buy the 22 mm hex at 10 Euro's . Dealer sorted it out in 20 minutes and back on the road , his charge 25 Euro's, so all in all a fairly expensive exercise.
Very grateful that it happened close to home and not 1000 km away.
On investigation it would appear that the 90 ' bend I had fitted to make it possible to pump the tyres at service stations had exerted too much sideways stress on the valve which finally caused it to break.
Looking at the valve itself , it is made from aluminium with a wall thickness of about 1 mm so there is not much meat to hold against a sideways force.
Have now made up an adapter from a broken cigarette lighter compressor and car tyre valve which I hope will prevent the problem from happening again.
Pic 1 shows the broken valve and the 90 " adapter
Pic 2 shows the valve from the top with the wall thickness
Pic 3 shows the new adapter.
So a word of caution if you are using the 90 ' adapters , you could suffer the same fate
