Originally Posted by
I-Like-To-Bike
Its useful if you want to top off the pressure at your leisure. And have you ever met anybody who cannot fill a bicycle tube at the gas station, except for those with incompatible valves?
Again, not terribly useful if you don't happen to be near a gas station nor with low pressure air systems.
Originally Posted by
I-Like-To-Bike
Not everybody buys their bicycle pumps or bike accessories at an LBS. The big box stores, the stores that sell the majority of bikes in the U.S., have lots of pumps on for sale that do NOT have any way to pump up a Presta valved tube.
And which ones would those be? The Giyo pump? The Beto Double Headed pump? The Schwinn Telescoping pump? The Zefal Air Profil pump? The Bell Airstrike? Or, perhaps, the Bell Telescopic? All 6 a capable of pumping up either valve and all 6 are available at Walmart for less than $30. Many of them are available for less than $10. I didn't see "lots of pumps on for sale that do NOT have any way to pump up a Presta valved tube." In fact, Walmart doesn't list a single pump that doesn't pump up both types of valves.