19

Some time ago, this black plastic tool was given to me by a guy from an LBS, and I remember thinking "oh, that might come in handy".

Now, a couple of months later I've completely forgotten its purpose. What is it for?

Unknown black piece of plastic

I know what the coin is for, but not the other thing.

4
  • 3
    Aside - if you can put a ruler in the photo rather than a coin, it gives a better idea of size. I've never seen a euro coin and have no idea how big it is.
    – Criggie
    Jan 16, 2023 at 19:50
  • 3
    The diameter is exactly 19.75 mm. Or just over 3/4" for our US friends.
    – Berend
    Jan 16, 2023 at 19:58
  • 1
    For comparison, the US small one-cent coin is only slightly smaller (19.05mm).
    – tripleee
    Jan 17, 2023 at 10:00
  • 1
    The 10 euro cent is good for some old style screws if you have nothing better at hand.
    – nightrider
    Jan 17, 2023 at 11:14

1 Answer 1

29

It is a valve core removal tool for presta valves. They can be used to replace a valve core or to temporarily remove the core when filling sealant through the valve (for tubeless tire setups).

6
  • Yes of course, now I remember!
    – Berend
    Jan 16, 2023 at 14:00
  • 10
    Pro tip: Put it in a zip baggie with a label before dropping it back into your tool box/drawer.
    – shoover
    Jan 17, 2023 at 0:32
  • 3
    Less common use: remove or install valve extenders.
    – Weiwen Ng
    Jan 17, 2023 at 7:19
  • I’d add that it’s plastic which is likely to fail. There are metal versions (Schwalbe makes a nice one) which are much stronger.
    – Michael
    Jan 17, 2023 at 12:14
  • 3
    For trailside (and home) use I really like the valve caps that have an integrated core removal tool. They are never misplaced.
    – jaknudsen
    Jan 17, 2023 at 20:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.