Originally Posted by
rekmeyata
Are you talking about the Lezyne Road Drive? If so, I'm not sure what people are doing wrong to unscrew the core. I've been using one since 2013 and never removed a core with it. The only thing I can say is to make sure you take a pair of small pliers and make sure the core is snug, but I've never had to do that with any of my tubes I've used.
No, my pump is the Topeak RaceRocket Mini Pump. As I said, the core was loose when I took the tube out of the box. The bike shop owner said he's seen this a lot lately. I wonder why. As I said, I'll check my tubes before I put them in my tool bag and I will also bring the valve tightening tool.