(Internet images of the Pace RC200 F2 suggest a round seatpost and lack of a brake bridge.) There are (load limited) racks that only attach to the seatpost, cantilevering above the rear wheel.
With that Old Man Mountain rack suggested above, you might have to use djb's suggested seatpost rack mount collar to anchor the upper rack arms.
Last edited by tcs; 11-17-23 at 06:02 PM.