What length presta valve should I use?
All DV wheels are shipped with a presta valve extender. DV (46 mm rim depth) presta tubes should use a 60+mm valve to put the pump head directly on the tube. Mid V (32 mm rim depth) wheels should use a 48 mm presta valve to put the pump head directly on the tube. KOM (23 mm rim) can use a standard length valve.