On a gravel ride with a small group, couple weeks ago, one rider caught a Big Goathead on a section of broken old roadbed. He had tube-presta, which he replaced...
Had a v-small mini hand pump... Another rider had a rechargeable min-pump, which was used as alternate to hand pump - quick back into action.
Took about 1+ min to pump up to solid use - believe it was a 38mm and he rode it at 50 psi....
worked great !
I have CO2 for my gravel... not liking to rely on them and also the addition to landfill...
I had ordered a rechargeable mini pump from Alixpress... received last week - not yet put into service... for gravel...



Mini Rechargeable Bike pump - Presta & Schrader

Tested and Worked Great to get my 42c gravel tire to 40ish psi & on same charge bring my road tire 25c to 75 lbs (I ride road at 74 front and 78 rear)

Plan to use the recharge pump for the gravel bike - hand pumping the larger gravel 42c size tire is definitely a longer process than the road tire...

as an aside - the instructions came with an 'alert/caution' to use a hose for 'vinyl' valves... I have TPU w/vinyl valves on the road bike...
I did the full pump up from flat state in 3 sets, allowing the pump to cool for about 30-45 sec between sets - never became really hot, just very lightly warm...
so no heat/melting issues with that method...

Ride On
Yuri

EDIT: replaced simple pic with one to show a size comparison... also, thickness is about 1.25" or 3 cm

EDIT 2: just some rambling connections (due to too much caffeine or awake time...)
hand pump = vinyl - abacus, pencil
CO2 = CD - Apple II - Macintosh, laptop
mini-rechargeable pump = streaming - smart phone
... wondering ... when astronauts are up for more than a few hours, if they have a 'fall-back' hand pump system when the have to 'take' (actually 'Leave') a crap in the ISS ???
so, using my laptop, I found this:
https://www.sciencing.com/1700095/ho...space-station/
LOL!