I have a Cube Stereo 120 2018. When I was driving today a car hit me. I'm fine but the bike has a dent in it made by the car door.

  1. Can it be fixed?
  2. Can I still ride it, and go MTB?
  3. Can I make a sort of modification, reinforcing the frame from outside?






  • 3
    It's impossible to say for sure without actually touching it, but the dent doesn't appear to create a significant structural hazard. I'd just watch it for any signs of cracking. Commented Jan 29, 2020 at 21:15
  • 5
    And I would wash the bike in order to get a better view on its whole surface. Maybe there are additional cracks somewhere on the frame, currently hidden among the mud spots. Commented Jan 29, 2020 at 21:37
  • 6
    Since the driver of a car hit you with the car, it is not your business to check if the damage is structural. Ask a bike shop who evaluates the damage to bikes. Let them do it and add the bill for the evaluation, plus the value loss of the bike, plus repairs to your claim against that driver (or their insurance).
    – gschenk
    Commented Jan 29, 2020 at 22:06
  • 2
    @gschenk - Not all car vs bicycle accidents are the car drivers fault. Good advice presuming the car driver was in the wrong.
    – mattnz
    Commented Jan 29, 2020 at 23:06
  • 1
    In many jurisdictions, (the more enlightened ones?) the default assumption when a motor vehicle hits a pedestrian or cyclist is that the driver is at fault. I agree with that default assumption.
    – Henry S
    Commented Jan 30, 2020 at 5:46

1 Answer 1


This is only engineering judgement, not technical analysis: the damage does not appear particularly serious or significant at that location. As Daniel advises above, keep an eye on it for cracks developing. If you are just a "normal" everyday type user it could be OK for quite a while. The Al frame will eventually crack and fail, not necessarily at this location. If you are a strong hard core competitor, then you wouldn't even consider using it for highly demanding duties would you?

  • 1
    Concur - add it to the monthly maintenance routine. Take a photo monthly, and check for changes over time. When it does start to change noticeably, stop riding it and reevaluate.
    – Criggie
    Commented Jan 30, 2020 at 7:09

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