Rim keeps cutting valve stem

[gmdahli]

I'm looking for a solution. Getting tired of fixing flats.

[cyclerUK]

What kind of rim - MTB / road?<br />
What kind of valve.?<br />
Where does it cut it?

[pja6709]

I'm no expert but if I were you I'd be looking at my tyre pressure, probably needs to be increased. Check on the tyre wall for max. pressure and inflate accordingly. I had this problem once, the tyre was spinning on the rim and breaking off the valve stem.

Cheers.

[Joe_W]

Look at the valve hole in the rim. If there are sharp edges they keep cutting your tube. Take a large drill or a file to "break" (don't know appropriate English term) the edge. Also check if the rim tape is seated correctly and the valve hole is not too large.

[trevgbb]

Assuming you are fitting correctly, the commonest cause of tyre slip and subsequent damage to the valve is under inflation, read about it here, page 25.
http://www.schwalbe.co.uk/shopdata/files/TechInfo2-GB.pdf