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CO2 charger cartridges are used for bike tire inflation because they are a common, inexpensive product that has been around since the 1950s. Their other uses include powering air guns and inflating life vests. They were originally developed by the Crosman Corporation and marketed under the name "Powerlet". Powerlet cartridges are filled with CO2 presumably ...


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I believe you will find these articles informative: The hidden life of a CO2 cartridge [PDF] The CO2 Cartridge … an Under-Appreciated Marvel of Technology! — George Fox Lang [PDF] At room temperature (below the 31°C/87.8°F critical temperature) a CO2 bottle is to a practical extent self-regulating. This is not possible with simple compressed air. You ...


9

Use strong cable ties or wire/cable to tie the biggest sprocket to the rear wheel spokes. This will eliminate the freewheel, so be very careful when slowing down or going downhill. If cable ties are too weak, shifting or brake cables should work nicely. If you don’t have any spares you could even scavenge the front derailleur shift cable. However, I think ...


8

This explains part of the reason in what may be too much detail:http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch4/deviation5.html If you're going to read any of it, read the material starting after the table listing "van der Waals Constants for the Various Gases". It calculates that compressing CO2 from 1 Liters to 0.2 Liters using the Ideal Gas Law (...


6

The answer to this question depends on the hub design. Other than Shimano and close copies of the Shimano design, many rear hubs use some variation of a drive ring based design. These are characterized by an oversize axle, a main bearing that's somewhere under the drive side hub flange as opposed to the end of the freehub body, and a freehub with pawls that ...


5

If you're going to buy a tube to carry, you'd be better off getting something that fits properly. You don't want to push the limits of your tube (e.g. burst it when you first inflate it) if you're a long walk from anything else, and the extra bulk/weight isn't much. Also fitting a tube at the side of the trail isn't easy especially in bad weather (and ...


5

There is a set of solutions that are more meant for prolonged off-road touring/bikepacking tours without any access to the civilization. They require a bit of preparation at home for such classes of failures. Convert the rear wheel to fixie mode by bolting a cog instead of the braking disc. This is done by flipping the rear wheel in the dropouts, unbolting ...


4

Assuming you have a fairly standard on-bike set of tools, I would have tried the cable ties first as well. Sometimes you can get the pawls to engage again by dropping the bike, and the shock drops one into place. If not, try rotating the wheel 90 degrees because some designs only have two pawls. If the freehub engages, then carefully ride while maintaining ...


4

I can't remember exactly what my problem was, but I once remember getting a big industrial paperclip (was at work when it happened) wrapping it around a spoke and then hooking it around one of the holes in the largest sprocket, which let me limp home, making sure not to change up into the largest few sprockets. From what I remember it was okay when up to ...


4

The word "c'mon" is a bad choice for an alert word, because you close your mouth to form the M and the C is a back-of-mouth sound that you can't say loudly. The N sound is a nasal sound, so the volume there is through your nose. So the only loud part of this word is "---OOOOOnnn" If your alert phrase was "Come on!" then it would be better than "c'mon", ...


3

The recommendation of Calvin Jones of Park Tool for a trail/road-side conversion to a single speed is: If you have multiple chain rings, put the chain on the 2nd-to-largest chain ring. I.e. if you have two chain rings, this will be your smallest. For the cassette, put the chain in a straight line back from the chosen chain ring. If in doubt, use the ...


2

Take off some spokes Most bike wheels have more spokes than are strictly necessary, so you can take off a few. Ideally you'd take off them symmetrically, but for a short trip it is not that critical. Bend the removed spokes around the largest cog. Depending on hub design, you can either tie the other end around the remaining spokes, or leave it inside the ...


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