[QUOTE=Duragrouch;23180216]Most rear racks are centered over the rear axle, so nearly all the payload weight goes there, the rack stays just hold it from tipping over forward or back, very little load, if there was, most flat stays would buckle, especially since most people curve the stays (I don't).

Yes, but the stays take the load to frame and dropouts. Most of the load does go to the rear wheel as you say, but the racks front stays carry a portion of the load and most of that too goes to the rear wheel. The rack stays must carry the load, or what else holds it up? And if the rack stays don't buckle, then they are structurally adequate.