I use front and rear Old Man Mountain racks. Bolt on model. I have threaded eyelets on the dropouts. I add a lock washer and bolt on back and I use blue Locktite on the threads. No problems there. I use P clamps on the seat stays instead of the eyelets. It makes a sturdier install. They are not the lightest racks available but they work well for me and I can't imagine them breaking under any circumstances other than a nasty crash.