NickJP wrote:I've seen some Shimano hollow crank failures, where either the bonding of the two parts that make up the hollow crank has separated, or the cranks break near where the crankarm and spider meet. There's an extensive thread about it on the Weightweenies forum:
I had a look through it. There are examples of failed Ultegra 6800 and D-A 9000 cranks but no 105 5800s, which were forged rather than glued.
Also no reports on the Ultegra R8000, some on DA R9100, and none on 105 R7000