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I was riding my bike one day and saw my font wheel axle nut on the right disappeared.

I tried to find replacements but none of them fit, I don't know the size of the nut so I cannot find one that fits. I got some nuts that were similar size, but they were 24t so it didn't fit, online people are selling 24t and 26t so I think mine is 26t but I am not sure.

The bike is a Supercycle Hooligan with 24" tires. Measurements preferred in mm but inches is fine too.

Btw, if I cannot find any online is it a good idea to 3d print them? I have a 3d printer and I can print in PLA or PETG but not sure if plastic would be a good idea to hold the front wheel in place.

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    Lightly grease the end of the axle, make a plaster cast of the end, carefully unscrew the plaster, and take it to a hardware store to be compared to bolts in the bins. Or simply haul the bike into the hardware store and find the right nut in the bins.
    – Daniel R Hicks
    Jun 17, 2019 at 0:47
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    @DanielRHicks Or just detach the remaining axle nut and take the wheel...
    – David Richerby
    Jun 17, 2019 at 9:12
  • If you only lost the right and side, then then take the left nut into a hardware store or bicycle store and find a replacement.It's a supercycle so it's likely something super common. If you don't have any nuts, just bring the wheel with you and you should be able to find one that fits.
    – Kibbee
    Jun 17, 2019 at 16:30

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The zero-information answer is that you should take the bike to a bike shop. Axle nuts are, as far as I'm aware, a pretty standard size; a bike shop will be able to figure out what size you need and will probably just give you a replacemnt nut. Buy something to make it worth their while.

Measurements preferred in mm but inches is fine too.

That's not how it works. If it's a metric size, you need a metric size; if it's an Imperial/American size, you need an Imperial/American size. It's not enough to say "Oh, half an inch is about 12mm and however-many threads per inch is about this number of threads per centimetre."

Btw, if I cannot find any online is it a good idea to 3d print them? I have a 3d printer and I can print in PLA or PETG but not sure if plastic would be a good idea to hold the front wheel in place.

No, no, one hundred times no! Not remotely strong enough.

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    It's also highly doubtful that one could 3d print the fine internal threads with sufficient accuracy.
    – Daniel R Hicks
    Jun 17, 2019 at 11:53

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