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Deflator for bicycle presta valves - quick release

Creation's quality: 5.0/5 (1 vote)
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3D model description

Quick release deflater for Presta valves which are commonly found on bicycle wheels.

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.

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.

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.

See also the original version for Schrader valves (complete with misspelling of "Shrader")

Is it a "deflator" or a "deflater"? Sure, whichever.

  • 3D file format: F3D and STL
  • Publication date: 2020/01/30 at 03:16



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Note: I wanted to try Cults3D as a possible alternative to Thingiverse, but after giving it a bit of a look, I'm not super impressed. Feel free to visit my Thingiverse page if they can manage to keep that site running:

I went to school as a mechanical engineer, and got interested in 3D modeling, specifically the SDRC I-DEAS CAD/CAM software system. This interest got me my first job working for a CAD/CAM reseller doing pre and post-sales support. I was lucky to be involved in 3D printing in the early 90s - for a demo of rapid prototyping, I modeled the mouse from my HP-UX CAD workstation and it was rendered via stereolithography. I still have that model, but across the years I stopped using CAD and moved to systems administration. Now that 3D printing is affordable and mostly reliable, I've gotten into it and am having a blast. I printed all the usual cute little trinkets and tchotchkes, but quickly got bored of that. What I find most interesting is needing something, then spending a little bit of time in a CAD program and soon after that having a real, functional version of the part in my hand.

I'm a cyclist and bike mechanic as a hobby and a side job, and have found endless applications of 3D printing to both bikes and bike maintenance. Coworkers have also come to me with many varied requests, each of which has been an interesting challenge and an opportunity to learn.

I am constantly learning, constantly trying to challenge myself to learn new things and technologies, so hopefully as I progress my designs will continue to improve.



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