I was happily using my Canonndale F5 Hardtail to commute to work and other places (like shopping, going to a swimming pool and the like) until recently I had a very unfortunate accident with a car. To make a story short, I managed to slightly bent the fork and the frame, where the derailleur is mounted. I would not notice the bent except that I was not able to adjust the gears, if this did not go through the insurance (which demanded a full inspection of the bike). See the pictures below.

The official examiner of the bike dramatically concluded that the bike is unusable. This increased the amount of money I could from the insurance, but the real question is how bad it is? Should I really dump the frame and look for another frame? Or I could try to bent the frame back? (I'll have to replace the fork for sure anyway).

How should one look for a budget frame (are there any types that one should try to avoid?) Being a naive browser I type 'carbon frame' in ebay and being left with hundreds of results. Can someone comment on MUSING X Lite Offroad Mountainbike Frame weighting 1350-grams?

Ultimately I am looking for an inexpensive frame/bike. Key optimization criteria here is the safety feel that one gets during lengthy working, shopping, and swimming hours (i.e., when the bike is being locked outside, passed by some questionnable crowed..). I commute some 10-20km every day.

bent frame bent fork scratch

  • 2
    I'm not sure that's bent enough to consider bent. Any other visible damage? Frame Alignment Gauge indicate that the frame was torqued? If not, I'd ride it.
    – joelmdev
    Sep 19, 2013 at 19:53
  • 6
    Why do you want a carbon frame? Everything you mentioned in the post leads me to think either aluminum or steel would be better for you.
    – Mike P
    Sep 19, 2013 at 20:31
  • 1
    You might reword the title to reflect that you're looking to verify whether your current frame is shot. Otherwise, you're asking two (tangentially) questions here.
    – WTHarper
    Sep 19, 2013 at 20:38
  • @jm2: excellent comment. Now I know the name of the tool I need to buy/get! Thanks a lot!
    – arthur
    Sep 19, 2013 at 22:06
  • 1
    You should omit the word "carbon" from your searches if you're looking for a "budget frame." Sep 20, 2013 at 4:25

1 Answer 1


My guess is the alignment was like that before the accident and the reason the gears wont adjust is the derailleur hanger is bent, which is a $10 part and/or a visit to the LBS with a tool to fix it.

Even if the frame has been bent, although less than ideal, it is not a safety issue and would not stop me using it - as long as the derailleur hanger can be aligned correctly.

However there may be other more critical, but less obvious damage (cracks etc), that you are not aware of, and this be the reason for the insurance write off.

As for going to carbon frame, for the same money you are almost certainly better off with a steel or alloy frame. Cheap carbon, like everything, is cheap for a good reason. As Carbon is seen as a material with God like qualities by many novices, it commands a price premium based on that perception at the budget end, its until you are paying mid range prices that carbon really shines.

  • Great answer, something along these lines what I was looking for. I suppose a mid range price for a carbon frame would start then at 600 Euro? Then the answer is not to get a carbon frame.
    – arthur
    Sep 19, 2013 at 22:12
  • I uploaded an additional Foto of a scratch. But I see it just as a small scratch and I tend to keep the frame. Scratches do not reduce the value of the bike a lot but reduces the motivation for the thieves substantially :)
    – arthur
    Sep 19, 2013 at 22:22
  • Wrt derailleur, it did was substantially scratched and bent after the accident and I'll definitely will have to get a completely new one.
    – arthur
    Sep 19, 2013 at 22:23

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