Originally Posted by
waynesulak
To me this is a classic example of carbon fiber. It is a great material but has drawbacks that users should consider and evaluate. Light and strong but some small danger of complete failure with only subtle warning signs. Danger that can be mitigated when the user keeps it them in mind and uses due care. Items need to be replaced if damaged or in doubt of damage. For those who want a product with a tolerance for user inattention or error it is not the best choice.
Chains break as well. So far we've managed to break one timing belt and one timing chain.
One fortunate thing is that when they do break, its usually under very high torque load, which typically corresponds with low speed.