Originally Posted by
Kapusta
The two best solutions I know of are...
1- the seatpost clamp that Happy Feet posted.
2- Use a rack stay like this that uses the hole in the seat-stay bridge. It should work with just about any rack out there (shown with a Topeak Explorer):
I like Topeak racks. Great. Curious question..... Why mount it to the brake when you have braze-ons for a rack.??
Op... Here's another style that should work for you. It's just a sample. There are many brands out there to choose from. See the link....
https://www.primeauvelo.com/en/topea...hoCh6YQAvD_BwE