Been there done that. Had to start walking home, luckily only 3 miles or so. Even luckier a car stopped and gave me and the bike a lift home.
The pump got tossed in the bin. Lever on pumps only for me now.
Been there done that. Had to start walking home, luckily only 3 miles or so. Even luckier a car stopped and gave me and the bike a lift home.
Are you sure about that Brucey.?From my O level chemistry Graham's Law of Effusion says the rate of effusion is inversely proportional to the square root of the molecular weight. CO2 has a higher MW than Nitrogen (air's main component) so I would have thought it was a better gas than air.
Well... you live and learn. Thanks Jonathan. I hope Brucey is not unwell. A lot of us out in internet land love his contributions.
He had a stroke. I think this goes to the heart of it
The end result is that if you use a CO2 cartridge to fix a puncture, it's best to let the tyre down and reinflate with your track pump when you get home.
Nearholmer wrote: ↑30 Dec 2022, 10:37pm TBH, I reckon that even a person with 20/20 vision would be unable to read it accurately, but the same applied to the teeny-weeny dial-type indicator on the Lezyne one that I had.
I like the idea of marking it at a predetermined pressure, although up to now I’ve managed OK on the basis of squeezing the tyre with my thumb, which was how we all managed before anyone put impossible to read indicators on portable pumps, from what I recall.
freiston wrote: ↑16 Aug 2022, 5:54pm. . . Re. the pressure gauge - I have put a piece of yellow insulation tape around it at the mark for the "maximum" pressure for my tyres. I can see the red indicator getting closer to it and I know that when it's on the tape, I should stop. I also find it easy to "gauge" pumping to a lower pressure by the distance to the tape.
Just to note there's several versions of Morph pumps and not all have a gauge.
I agree it's not easy to read, that is the price of lightweight and compactness, but it is possible. Like anything unfamiliar, it takes some getting used to. Persistence pays. So many times someone I'm helping has prodded their tyre with a thumb and said "I think that's hard enough", but when I squint closely at the little gauge I have to tell them no, we're still only halfway there. Pumping up bike tyres is not an exact science, near enough is good enough, and this gauge is an order of magnitude better than a thumb!
Yes, but I won't take my expensive glasses out cycling, I have of late taken to carrying a small magnifying glass that slides into a plastic case - it's most useful I find for reading small print etc. Without the encumbrance of a steel glasses case needed to protect decent spectacles.CJ wrote: ↑4 Jan 2023, 6:48pmI agree it's not easy to read, that is the price of lightweight and compactness, but it is possible. Like anything unfamiliar, it takes some getting used to. Persistence pays. So many times someone I'm helping has prodded their tyre with a thumb and said "I think that's hard enough", but when I squint closely at the little gauge I have to tell them no, we're still only halfway there. Pumping up bike tyres is not an exact science, near enough is good enough, and this gauge is an order of magnitude better than a thumb!
I'm 68 by the way and wear varifocals - all of the time. A lot of cyclists, so I find, are reluctant to accept that they need glasses for cycling and muddle on far too long with putting on and taking off cheap reading glasses that don't exactly match their ideal prescription and get dusty and smeared in a pocket.