I've got a wheelset with heavily worn rims. This was a cross wheelset used for riding in pretty sloppy conditions all the time. This was a rim brake based wheelset and used with cantilever brakes. Now the braking surface is rather concave. It's worn enough that I feel like riding on the road would be unsafe due to risk of failure.
I was considering just using the wheels on my trainer, where I would no longer need to do much in terms of braking (and won't actually be going anywhere). Do you think this is safe, or should I just go out and buy a cheap / heavy wheelset for indoor training?