Old 02-11-19, 03:56 PM
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Haven't read all the posts, but the TT photo shows a crack on the top side most likely resulting from a tensile load. The TT is normally loaded in compression, the ST in compression, and the DT in tension. Sitting on a TT would bend it the wrong way and it would crack on the bottom, if at all. But CF strength in tension is very high, and likewise the matrix in compression.
Also, the tube wall stresses are so easily measured with strain gages under full service loading that a material mismatch is pretty hard to imagine, from Specialized or others.
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