I got out my Cannondale owners manual a few months back for a similar post.
There were weight limits listed for each frame covered in my OM.

I did a century last month and around mile 60 I saw a 300+lb guy get picked up by the broom wagon. Not because he physically couldn't keep going but because he had broken several spokes. He said it happens a lot. I agree with the people who are advising about paying attention to the wheels.

Biking is a great sport. You will love sharing the experience with your daughter.