Originally Posted by
mvMcfly
So, I'm looking at the Lezyne site and trying to figure out what changes when you move up their line. Looks like you add PSI moving from Steel > Alloy > CNC and you change material.
My questions:
1) Does the valve chuck have problems with tubes that have removable valve stems? (ie it unscrews the valve)
2) Why would you choose CNC over Alloy?
I don't think the screw on chuck would present a problem with removable valve stems. It might mean that it is a 2 handed operation. It takes a little longer to screw in on as opposed to flipping a lever on other pumps, but you won't tear out a valve stem either which I have done with a Joe Blow Pro.
The CNC is completely machined including the piston. The alloy pump has is not built to the same tolerances but all of the internals are the same. When I bought my CNC, it was only about $10 more than the alloy version. I am very happy with my Lezyne CNC pump and I think it is the last floor pump I will ever need to buy.