Originally Posted by
Bob Dopolina
I hope you're ok.
That look excessive based on the fact that it shattered in the middle of the top tube. I've t-boned stuff at greater speed and although I was bent and broken my bike was fine.
If the frame was going to fail I would expect to see a failure at the junctions between the top tube, down tube and head tube but not in the middle of a tube like that. Not at those speeds.
It looks kind of like the tubes fractured where the cable stops are riveted. The holes from the rivets will create a stress concentration right there. Stress will also want to concentrate at the interface between the "rigid" cable stop and the "soft" carbon tube.
Also, as you know, there are different ways of building carbon frames. Some lead to the weakest area being at the tube joints, some in the middle of the tube or where lugs and tubes are joined.
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Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --
the tiniest sprinter