Two years ago I had the wheels on my Ryan Vanguard replaced with ones with
velocity deep dish rims. Although I had them drilled out for Shraeder tubes
I will be going back to presta tubes. Unfortunitly no one seems to make long
stem presta tubes for 20" tires. Although there are valve exstenders out
there I have been told they don't work very well. I recently returned from
my local bike shop and discovered a neat little device to address my
problem. It is very familiar to the valve extender. With this device you
remove the valve core screw this devise on then screw the valve core on this
devise and wala you have a long stem presta tube. But like so many ideas out
there there is a drawback. The only manufacturer out there that makes
removable presta tube cores is Conti. My question is, is there anyone else
out there that makes 20" presta tubes with removable cores?
Mike.