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I have a problem to verify the model of the bicycle.

I have frame number - A4D58277 but can't check anywhere in Google, by which company was made.

  • 7
    There is no universal registration of bike serial numbers. Even the number stamped on the frame doesn't necessarily mean much. Your best bet is to figure out the manufacture of the frame, and see if they have a lookup for it. However, all of this is generally irrelevant, as who originally made a bike doesn't have any real bearing on its rideability.
    – Ross
    Commented May 8, 2019 at 12:19
  • 6
    Possible duplicate of Why shouldn't I care what model/make/year my bicycle is?
    – Ross
    Commented May 8, 2019 at 12:19
  • Can you add a photo?
    – Swifty
    Commented May 8, 2019 at 12:36
  • 2
    This question shoud be closed and not set as duplicate.
    – Ced
    Commented May 8, 2019 at 13:10
  • 2
    @David Curiosity is always a valid reason. However, unless you are trying to restore a bike to original condition, it's much easier to figure out replacement parts by measuring than by figuring out what make the bike is and then also finding the specs of that bike in enough detail to know, e.g., what kind of bottom bracket it has: both of those things tend to be very difficult. Commented May 8, 2019 at 17:37

3 Answers 3


The logo on the downtube shows some similarity to the logo on this bike: https://www.ccrracing.de/road-rahmen/13-ccr-attack-carbon-rahmen.html

I can’t find a similar looking model on that site but you could contact them at least to ask about the serial number. It seems like the best place to ask, in the first instance.

It looks to me like it’s a metal frame, road style, but current models on that site are all carbon and mostly TT frames. Could be relevant to the question, maybe it’s an older model, I don’t know the history of the company.

Googling CCR is hampered by a model of Fuji bikes with that name, the band Creedence Clearwater Revival and a model of Koenigsegg which all seem to be more famous.

We’re now looking at Quantec, so I’m parking this link here for posterity: http://www.quantec-bikes.de/page/road/race_sl.html


Basically, the answer to the title question is "You can't." There's no global database and each manufacturer just uses whatever scheme they want. Unless you've already narrowed it down to a couple of candidate manufacturers, the serial number won't help you.


@Swifty I have written a letter to https: //www.ccrracing.de/road-rahmen/13-ccr-attack-carbon-rahmen.html but they didn't approve and said "Its looks like a quantec bike"

  • It shows some similarity to this one, in the head tube and cable stops particularly: quantec-bikes.de/page/road/race_sl.html the fork is different but given a respray seems likely, that could have been swapped out very easily. Worth emailing quantec with the serial number and photos
    – Swifty
    Commented May 9, 2019 at 20:27
  • 1
    At least CCR were kind enough to reply so you know that it isn’t one of theirs
    – Swifty
    Commented May 9, 2019 at 20:28
  • @Swifty I wrote to quantec and they answered me: "Hello, we do not registrate the serial numbers. Maybe we sold this frame! It seems to be the model Quantec Race SL - 95%" Commented May 13, 2019 at 10:23
  • That’s a pity but again it was kind of them to answer. I think there are strong similarities between them, 95% confidence from Quantec seems good!
    – Swifty
    Commented May 13, 2019 at 10:50
  • @Swifty I agree with you that 95% almost match) Commented May 13, 2019 at 11:49

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