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Anyone else mount their rear racks on the same bolt as their brake calipers? Seems a little sketchy to me but I have very few options with my frame, I have a pair of eyelets right next to my rear dropouts but nothing further up the seat stay. Either I do something like that which I've seen online or I get a well rated seat post clamp.
I don't see myself putting more than the 20lbs those seatpost style ones are rated for anyway, that's a couple six packs or gallons of milk and a half dozen canned goods. Even if I got a traditional style rack anchored in multiple points I'm thinking I'd have to pay for quality as I've seen plenty examples of the cheap ones breaking just as easily as a seatpost style setup.