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https://www.crosslakesales.com/products/prestacycle-prestaflator-tool-rebuild-kit-o-ring-new

I asked the company that manufactures them, they said they didn't know.

Does anyone know the sizes? I ask because the set is not available in the UK. Flying it over the Atlantic seems ridonkulous when I could just buy some o rings here.

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  • Do you not have the old o-rings?
    – Batman
    Commented May 27, 2018 at 11:46
  • 3
    If you have the old rings, measure them. Or, better, take them to a shop and find a match.
    – Daniel R Hicks
    Commented May 27, 2018 at 12:21
  • 2
    I bought a cheap multipack of "various sizes" of O rings for about $4. It will probably be a standard size. Good luck!
    – Criggie ♦
    Commented May 27, 2018 at 12:23
  • Unfortunately, i don't have the old one i need. It disintegrated and I threw it away before i thought to measure it
    – Ne Mo
    Commented May 27, 2018 at 12:26
  • 2
    I'd go with criggie's approach then. Maybe take the inflator tool to the hardware shop and compare with a few there.
    – Batman
    Commented May 27, 2018 at 12:36

2 Answers 2

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Got mine from AliExpress 10X5X2.5mm O seal ring for US$2.

Tested it and it fix perfect.

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Based on the photo in the question the big O ring is 12 mm outside to outside. The O ring rubber is 2 mm thick.

Googling tells me:

O-rings made from high quality buna-nitrile (BN70) rubber with a durometer rating of 70.

https://cdn.shopify.com/s/files/1/0360/5145/products/364670-5_30b26b5e-ef96-4c0a-bfdd-11a75617295e_1024x1024.jpg?v=1505314851

This is proportional to the inventory sticker being 12.0mm high as per all the ones I found in my house.

There appear to be two other sizes in the bag as well, one smaller and one thicker like a tap washer.

Own work

Given this bag of parts is $3.95 USD from several LBS and from Amazon its hardly worth messing about. If the freight is too much, ask for an envelope not a parcel or order more things to make it worthwhile.

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2
  • Stressing that this is an estimate based on the photo, not a qualified measurement from a sample.
    – Criggie ♦
    Commented May 27, 2018 at 12:47
  • Yeah it's more I don't want to rack up the air miles. Good skills with the image! :)
    – Ne Mo
    Commented May 27, 2018 at 17:10

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