Lezyne mini pumps and valve cores - any update?

Newer ones have a pressure release valve, which is supposed to break the seal and help with valve core unscrewing.

I've never had a problem with valves unscrewing either way (I tend to do them up reasonably tight), so can't say if it made a difference.

All you have to do is make sure the valve is done up tight. I think I’ve had 1 loosen over the last 10+ years and after I tightened it up properly it never came loose again.

No need to glue them in

I've found that a bit of saliva before insertion helps...

I’ve found almost any other brand pump to be better at the job

Prefer Toepeak pumps but I’d already bought my Pressure Drive as it fits perfectly in my bar bag and hip pack, so my solution is to use a valve extender like you need for deep aero rims. Just keep it screwed into the presta end and it still screws into the storage end with it attached.

You can either tighten the valve cores, or just not tighten the pump on fully - it only has to be airtight.

Once you've had the valve core problem once, if it keeps happening, the problem is not with the pump.

Best to steer clear and get a Silca Tattico or the gravel version.

I use a £2 presta to Schrader adapter.

Once you’ve had the valve core problem once, if it keeps happening, the problem is not with the pump.

It's still a shit design that you have learned to live with. I'll take a quality product first thanks especially as often I'm using it on other folks valves and have no idea how competent their mechanic is.

As above, I used to pull my valve cores out with my Lezyne pump until I stopped screwing them in by hand and used a proper tool instead. I actually stopped using the pump for a while, but found that the various Topeaks etc weren't quite as good, or compact.

Also, if you have one of the old-style ones without the button release, unscrew the hose at the pump end before attempting to unscrew the valve end.

I’ve got both lezyne track and mini pumps. It’s not an issue if used properly.

Ensure valve core is tight (the only times I’ve unscrewed valve cores is on other peoples bikes where they were loose to start with).

Carrying one of the tiny plastic valve core removers is key. If you’re running tubeless you’ll need one anyway and they’re tiny and weight nothing. No more excuses for loose cores.

If fitted, use the pressure relief valve function.
For a mini pump without the pressure relief function, unscrewing the pump end first has the same effect
If you can’t do either of the above (such as when using a CO2 cartridge on one of the funky dual purpose mini pump hoses) push slightly against the valve whilst undoing.

None of the above is hard and I consider it just basic mechanical sympathy and a vague understanding of the physics of what’s going on.

I just do my valve cores tight enough and also have a valve cap with an integrated valve core tool

I’ve found almost any other brand pump to be better at the job

Just for balance, I've always been happy with Lezyne mini pumps (less convinced by their track pumps).

Having a flexible hose works well for mini pumps for me, I find I'm much more likely to damage the valves with a fixed pump head. Pump not being directly attached to the valve gives me a lot more confidence in more aggressive pumping if I'm in a rush.

Have to say, wouldn't use any other brand, I think they're great and bulletproof. As above, once the core is tightened up sufficiently initially, never have an issue. I have one of their track pumps for 15+ years, still going strong, gauge reports 7psi higher than actual psi but consistently across the range so not a problem.

Had some of their multitools, not so impressed with them 🙂

The button works so well it's idiot proof, or just don't put them on so tight. I have bith types, the one without the button works fine if adjust your technique a bit

No problem with mine (has "the button") and I think it's better made than the Topeak it replaced.