Scrod, my son's girlfriend has gone and fallen in love with a second hand bike. It's a 4 year old Orbea Dama. It's being sold by a shop with a good reputation for looking after their customers, for not telling bull**** and for knowing what they're talking about, so I'm not concerned about that. The price seems good. I get to see her test riding it on saturday so that'll confirm that it fits (pretty sure it does). The bike shop has, apparently, stripped the bike down and checked the frame, particularly the carbon parts as much as can be done visually. All this is good and a waste of your thread.
However, the previous owner was a little old lady who only raced it on sundays
Actually, I jest, but the previous owner was an older lady (probably my age) who didn't do many miles on the bike. However, she did use it for spin classes. This bike has a carbon fibre fork and rear triangle. As I understand things, spin classes where you use your own bike mean it's clamped into a stationary trainer. I also understand that a carbon fibre fork is designed for road stresses, not the sorts of stresses you get in a stationary trainer, particularly when doing stupid things like spin classes.
I personally don't trust carbon fibre but this bike seems ideal for her and her needs, so don't want to go putting a damper on things just to massage my own misconceptions.
So, bearing in mind that Orbea are a good brand, that the bike is four years old, the bike has been visually checked but has spent some reasonable time in a stationary trainer, how concerned should I be about the integrity of this fork?