Deflator for bicycle presta valves - quick release

prusaprinters

<p>Quick release deflater for Presta valves which are commonly found on bicycle wheels.</p> <p>Unscrew the Presta valve locknut and push this piece on, it will hold itself in place while it holds the valve open, allowing the tire to deflate while you do other things. Press the button to open it up and remove it. Despite it having M6x1 threads, it should still grab a smooth valve shaft securely enough to keep those valves open as well.</p> <p>Useful to have at least two printed if you have to work on a bike where you are doing maintenance to the tires, such as a tubeless sealant refresh or swapping tires. Once the bike is in the stand and the Presta locknuts are open, pop one of these on each tire valve and this will deflate the tires while you are pulling the wheels out of the frame.</p> <p>This can also be done with a Presta valve cap if you cut off the very end, but that has to be threaded on and that's more work.</p> <p>See also the <a href="https://www.thingiverse.com/thing:3355831">original version for Schrader valves</a> (complete with misspelling of "Shrader")</p> <p>Is it a "deflator" or a "deflater"? Sure, whichever.</p> <h3>Print instructions</h3><h3>Category: Hand Tools Summary</h3> <p>Quick release deflater for Presta valves which are commonly found on bicycle wheels.</p> <p>Unscrew the Presta valve locknut and push this piece on, it will hold itself in place while it holds the valve open, allowing the tire to deflate while you do other things. Press the button to open it up and remove it. Despite it having M6x1 threads, it should still grab a smooth valve shaft securely enough to keep those valves open as well.</p> <p>Useful to have at least two printed if you have to work on a bike where you are doing maintenance to the tires, such as a tubeless sealant refresh or swapping tires. Once the bike is in the stand and the Presta locknuts are open, pop one of these on each tire valve and this will deflate the tires while you are pulling the wheels out of the frame.</p> <p>This can also be done with a Presta valve cap if you cut off the very end, but that has to be threaded on and that's more work.</p> <p>See also the <a href="https://www.thingiverse.com/thing:3355831">original version for Schrader valves</a> (complete with misspelling of "Shrader")</p> <p>Is it a "deflator" or a "deflater"? Sure, whichever.</p>