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I was looking at a used aluminum frame Cannondale from 2017 but the serial number sticker is missing:

Cannondale bikes will display the serial number on the underside of the frame. It’ll be next to a bar code.

cannondale bike bottom bracket with serial number sticker highlighted

Source: Cannondale registration pgae

I was wondering if the serial number can be found somewhere else on the frame in case of a missing sticker. I have seen it stamped below the bottom bracket in other brands' aluminum frames, but not on this bike.

Thanks for your help!

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  • Sometimes there's a number (though usually not the serial number) on one of the rear dropouts. Feb 4, 2021 at 1:07
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    A missing serial number on a second hand frame could point towards a dubious provenance a.k.a theft.
    – Carel
    Feb 5, 2021 at 15:07

2 Answers 2

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I heard back from Cannondale support. The sticker is the only way to know the serial number on their newer bikes:

No, the serial number is not stamped on the frame. It is underneath the bottom bracket on a sticker with a bar code, 2 letters + 5 numbers.

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    Way to go Cannondale great way to help the bike thieves!
    – Tom Dooley
    Aug 3, 2022 at 15:20
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I don't know my model or anything about my bike, but, I found some numbers imprinted into the metal on the bottom of the bike. The best way I can explain it is the number is where the back tire is, on the bottom of one of the horizontal rods, connected to the tire. (opposite of the gear side)

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