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I purchased this Bottecchia full-carbon frame a a few years ago and built it up using Shimano 105 components. Shortly after the build was done it came off the rear mounted rack on my car and went under a U-Haul truck and was dragged for at least a few hundred feet. Upon inspection there appeared to be zero damage to the frame itself...not one scratch. However, the crankset, front fork, handlebar, one shifter, seat, both wheels and rear derailleur were destroyed. I replaced the 105 group with Ultegra, new seat, replaced the crankset, upgraded the wheelset and upgraded to a Easton EC70 fork and bars.

That was 6 years ago and due to rotator cuff issues I have never ridden the bike. Now I am interested in getting back on it, but am concerned about the integrity of the frame. If needed I'll replace the frame and swap over all of the components, but I'd really like to use this frame if possible.Any suggestions on inspection and/or testing the strength of the frame would be appreciated.

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    There's a previous question about assessing damage to a carbon frame but you say there isn't even a scratch on it. Most articles I can find talk about determining if a frame is cracked vs. scratched, but the same applies... Honestly, if there's no visible damage, and no squishiness when applying riding forces to it, I'd be inclined to at least give it a test ride. – DavidW Jul 30 '19 at 19:19
  • I'd think it would be difficult if not impossible to damage a carbon fiber frame without causing visible damage, but you can always do a "tap test" over the frame, trying to find areas that sound "mushy", especially when compared to a part that should sound exactly the same (left side of downtube vs right side of downtube, for example). See some of the results at google.com/search?q=carbon+fiber+tap+test – Andrew Henle Jul 30 '19 at 20:07
  • There are services that will perform x-ray inspections (or other nondestructive penetrating techniques) on carbon bikes. My concern is that because carbon has a catastrophic failure mode, one day it seems fine and the next day you're eating pavement. – Adam Rice Jul 30 '19 at 21:54
  • I'd strongly recommend finding a local (as possible) frame builder who works in carbon and have him give it a go over. She'll have the experience and knowledge to be able to give you a fair assessment of whether it's safe to ride or not. Also, being able to get his hands on it, she'll have a much better chance of giving a good assessment than a bunch of people looking at a picture and making guesses. – FreeMan Jul 31 '19 at 20:16
  • Did another intense visual inspection and found zero evidence anything has ever touched this frame. Did the "tap test" on the entire frame and it resulted in no areas that sounded odd in any way. Might be interested in the x-ray inspection..any idea of the cost on this? – Audie Aug 2 '19 at 21:18

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