36 votes

Why are emergency inflation cartridges filled with CO2?

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 ...
Argenti Apparatus's user avatar
26 votes

Why are emergency inflation cartridges filled with CO2?

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 ...
Mr.Wizard's user avatar
  • 361
13 votes
Accepted

New inner tube bulges near the valve when inflated

Unless the tire bead (the re-enforcing wire around the edges) is damaged your tire is simply not seated on the rim properly near the valve and has popped off as the tube was inflated. Tube size seems ...
Argenti Apparatus's user avatar
13 votes
Accepted

What air attachment screws onto a Presta valve with the core removed? High volume for seating bead?

Inflator heads with Presta fittings let you do this because they tend to (always?) seal down around the stem, not the core. I don't know any other way. I suppose you could also take a spare Presta ...
Nathan Knutson's user avatar
13 votes
Accepted

How did these pimple/bubble/bump shapes form on my tube?

The culprit is the rim tape. The glue that holds it in place has lost its grip, and when the tube is inflated, the tape is pushed away and lets the tube to extend into spoke hole. Eventually the edge ...
ojs's user avatar
  • 21.6k
11 votes

Back tire flat only when I sit on it

A tire may look fully inflated when only the bike's weight is on it. The median bike weight is somewhere between 10 and 15 kilograms, so about half of that on each wheel. But add a rider who weighs ...
Criggie's user avatar
  • 120k
10 votes
Accepted

How much pressure to inflate a tubeless tire so it seats into the rim

TLDR: The pressure you put into the bottle is NOT the pressure to which you inflate the tyre. The pressure drops down as the volume increases when you connect the bottle with the tyre. The final ...
Vladimir F Героям слава's user avatar
9 votes

Back tire flat only when I sit on it

If you're used to wider tyres, you may be used to a certain level of firmness under pressure. Narrower tyres need to feel a lot harder. They will still have some give when you squeeze them with your ...
Chris H's user avatar
  • 55.8k
8 votes

Why are emergency inflation cartridges filled with CO2?

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 ...
redrubberball's user avatar
8 votes
Accepted

Are CO2 cartridges feasable for use on fat bike tires?

The short version: Yes, they are feasible. The long version: You can do a minor adjustment of my answer in this question by changing the molar masses involved. The molar mass of carbon dioxide is ...
Batman's user avatar
  • 46k
8 votes

My rim exploded inflating on an automatic pump of a gas station. Should I reuse wheel's spokes/hub or buy everything new?

I don't know what kind of air pump you were using at the gas station. If it was a manual one with just a pressure gauge attached, you can usually use them if you are careful enough. Automatic air ...
cmaster - reinstate monica's user avatar
7 votes
Accepted

What to check after blowing tire off rim

I'd change it for a better tire, one that's much tighter on the rim. You inflated out to only 15 psi over its maximum. That kind of force could easily be generated in a quick turn with the brakes on....
andy256's user avatar
  • 17.2k
7 votes

Have I damaged my tyres?

Those strings are quite common with continental tires and seem to be a part of their manufacturing process. Every continental tire I have owned seem to have some of those threads, even ones that ...
Rider_X's user avatar
  • 30.4k
7 votes

How to inflate a tire with a Presta valve?

For shorter stem presta valves in deep rims the trick to fill air is to first deflate the tyre about 50%, then push the pump head onto the stem with one hand while at the same time pushing the stem ...
Sanjiv's user avatar
  • 71
7 votes

My rim exploded inflating on an automatic pump of a gas station. Should I reuse wheel's spokes/hub or buy everything new?

It's not 100% clear from your pictures and description, but it appears that the rim failed at the outer radius of the "working" portion of the brake surface. This is consistent with failure due to ...
Daniel R Hicks's user avatar
7 votes

Is a powered car tire inflator suitable for road bike tire inflation?

Buy a floor pump, also known as a track pump, instead of an automotive accessory. A track pump will take about the same time to top up your tires as a small car compressor, and has an advantage of ...
Criggie's user avatar
  • 120k
7 votes

Back tire flat only when I sit on it

If the tyre becomes flat, i.e. the pressure that was actually there is lost, when you sit and ride on the tyre, it can mean that there is a puncture, that is impartially sealed by the object that ...
Vladimir F Героям слава's user avatar
6 votes

How often should air spring forks be reinflated (topped up)?

For one, it depends on how sensitive you are to changes in suspension performance. You can’t really measure for any drop (your shock pump will initially steal some of the air chamber’s air in order to ...
MaplePanda's user avatar
  • 15.4k
5 votes

Flat tire after inflating to max pressure

When in doubt, it's much easier to just completely replace the inner tube. They are consumable (like brake pads) and will only cost you a couple of pounds/dollars. This can be annoying and tricky at ...
Smeato's user avatar
  • 222
5 votes

Is a powered car tire inflator suitable for road bike tire inflation?

I have one of such compressors for car use and of course I have used it on my bikes. However, I only use it on MTB bikes which I inflate to 40 psi at most. I Do not own a road bike but some slick ...
Jahaziel's user avatar
  • 12.1k
4 votes
Accepted

Sudden loss of air on tubless tyre, and now it won't inflate

Your valve should NOT be depressible into the rim. You should have a presta ring screwed in it, else nothing is retaining the valve and your air probably leaks from there! If its not the case, if ...
danbord's user avatar
  • 258
4 votes

Presta valve inner tube issue: area around the valve does not fill up

When you fill up an inner tube outside of a tire, the area near the valve will look a bit constricted because the rubber is reinforced in that area: However, when you fill it inside the tire, don't ...
RoboKaren's user avatar
  • 28.9k
4 votes
Accepted

Have I damaged my tyres?

It turns out the tyre wasn't fine; here it is 2000km later. The tyre has split in two places on one side, and the bond between the bead and the sidewall looks pretty compromised all the way around. ...
Will Vousden's user avatar
  • 3,941
4 votes
Accepted

Uneven inflation of a new inner tube?

Yes you did something wrong. You are supposed to put the tube in the tire and mount it on the rim. If you inflate a balloon you will see similar behavior. After you have stretched a tube IN the tire ...
paparazzo's user avatar
  • 15.5k
4 votes
Accepted

Is a powered car tire inflator suitable for road bike tire inflation?

There's a lot going on in this question! The pump pictured seems to be intended for car tyres which can be considered high volume, low pressure and feature Schrader valves. A 120 psi road bike tyre ...
Swifty's user avatar
  • 12.7k
4 votes

How did these pimple/bubble/bump shapes form on my tube?

The bumps/dimples in the tube are due to the tube bulging out into the depressions in the rim above the spokes. As the other posters have said, the primary suspect is the rim tape. It might be ...
Velo Traveler's user avatar
4 votes
Accepted

Tubeless holding high psi, leaking at rim/bead during low pressure

With the information given the next thing to look critically at is the tape. (I'm assuming some effort was made with the sealant in to get it distributed all along the sidewalls, ie turning the wheel ...
Nathan Knutson's user avatar
4 votes
Accepted

How Can I Get A Troublesome Tubeless Tire to Inflate and Seat on the Bead?

I bought an adaptor for Presta valves to fit into Schrader chucks. With that adaptor I can use the compressed air lines at service stations (ie those places where drivers refuel cars). The compressed ...
gschenk's user avatar
  • 9,474
4 votes

How Can I Get A Troublesome Tubeless Tire to Inflate and Seat on the Bead?

After several years on lightweight clinchers, I eventually got fed up with untimely punctures and decided to put back good old first gen Pro Ones, even though these make the bike heavier. Things didn'...
Klaster_1 Нет войне's user avatar
3 votes

Why does rear tire lose 35 psi in a week with new innertube and tire?

A possible (even likely) cause is a leaking valve. The simplest thing to do first is to see if blowing air out if the valve (by depressing the pin) solves the problem. You wouldn't see the dust if it ...
andy256's user avatar
  • 17.2k

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