4 added information on valve extenders that thread into valve core threads.
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As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it onto the rim.

Some types of valve extenders used by people with deep profile rims thread into the valve core threads.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it onto the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it onto the rim.

Some types of valve extenders used by people with deep profile rims thread into the valve core threads.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

3 edited body
source | link

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it intoonto the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it into the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it onto the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

2 grammar, slight clarification of were slime/sealant might be added
source | link

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it into the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime into a tube. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it into the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

As others have mentioned one reason is to make it easier to installed slime/sealant into a tube or tire. Typically you'll take the valve off, and use an injector to put the slime into the tire.

For tubeless tire setups, removing the valve core allows a higher volume of air to quickly get into the tire when you are first blowing it into the rim.

Another reason to have removable Presta valves is they tend to be somewhat fragile so being able to replace a busted valve vs. having to replace the whole tube could potentially save a little bit of money (or allot of money if we are talking about breaking the valve core on a $150 tubular tire.)

The valve cores should be consistent from maker to maker.

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