Originally Posted by Al1943
I like to use tubes with no threads on the stem because the threads are hard on pump chuck "O" rings. My favorite tubes for road bikes are Michelin Ultra Lite.
Al
Just this weekend I replaced my tires (700c x 23) and installed Michelin A1/B1 AirComp Tubes (Ultra Lite) with 52mm stems. I have found the air chuck on my Park Tool PFP-3 Home Mechanic Floor Pump does not fit as well as the previous stems I have used (either smooth or threaded). In fact the other Michelin tubes I had (Michelin A1 AirStop Tube with a smooth 36mm stem) fit the chuck just fine. Anyone else have this problem. The problem I am having is related to the insertion depth. The length of the small dia. section on the Ultra Lite 52mm length stem is not allowing the seal on the chuck much room for a seal. I will take some photos to illustrate.