Originally Posted by
Carbonfiberboy
I'm trying to think of anything on a carbon bike where one could overtighten it and damage the frame or fork. Frankly, I can't. Brake bolts are the only thing I can think of, and they're in aluminum compression sleeves, so not really anything one could hurt there, either. The only thing that really needs a torque wrench is the cassette lockring and that's the same on every bike. I've never gotten a bike back from a shop yet where they used a torque wrench on it. Always check that, folks! A friend just had their cassette come off last week. Happens all the time.
Yes, brake bolts, but also carbon stems especially clamping to carbon handlebars or steer tubes, seat post clamps onto carbon seat posts or carbon seat rails should all be installed using a torque wrench. These are things that routinely get unfastened when taking the bike apart if you have to fly with your bike. If a shop is doing these things to a cabon bike without using a torque wrench they are doing their customers a disservice.