I've been looking for tubes with replaceable Presta valves but the only one I've been able to find is Schwalbe. Anyone aware of other manufactures with this feature.

The Michelin A1/B1 Aircomp tubes have replaceable valves.

I believe Continental tubes have replaceable valve cores-

+1.

All Continental tubes and tubular tires have replaceable valve cores.

Out of curiousity, how come?

Out of curiousity, how come?

I have a set of AC 350 MTB wheels and with a 40mm tube stem it is a hard go to get the pump on the valve stem without removing the lock nut. Not many mtb tubes with a 60mm stem.

Vittoria make valve extenders that are perfect for my problem. You remove the complete valve assembly from the valve stem (they have flats for a wrench) and insert the extender into the valve stem. The valve assembly is then screwed into the extender and voila, I now have 80mm valve stems that can be opened or closed friom the top.


https://www.excelsports.com/new.asp?p...jor=1&minor=31

I was also looking for replaceable Presta valve that is a little longer then the ones used in Asia bikes. The Presta valve that is on most tube mountain bikes tend to break off at the base. I have had it happened 4 times on the road. I usually have a flat then walk the bike then when I get to replace it I found that the base has been riped; off course due to dragging on the dirt. I replace the valve with the local made one but they are a little short for the double wall rims. I wonder if anyone know where I can get some in the states? The regular ones, I can't replace it once it fall off.

Ponderz

I think Topeak also makes a valve extender that doesn't require removal of the valve core.

Continental also makes those. They work well.