I don't know make and model of the seat post. I know the post is carbon. Don't know what the clamp is made of. I was riding on flat road with some minor pavement cracks at about 20mph. I heard and felt a loud snap/crack noise. My first thought was a blow out. Then I was wondering why I was on the ground. I am a big guy. I've been riding on this bicycle for just over 2 years (14k miles). For my size, should I replace periodically?