So I have a bike with rear eyelets, but no braze-ons. I'd like to get a rack rated to hold at least 50#. If I did so, I'd probably use p-clamps to hold them to the seatstays. Would the weakness of the p-clamps cancel out the high weight rating for those racks? Should I just get an old man mountain rack? Are there any other rear racks that do not require braze ons (or that p-clamps would work especially well with?)
(ps - I've done multiple searches on the topic - I know it's been covered relatively well, but none of the threads addressed how clamps instead of braze-ons affect the usability of fully loaded racks).