After being installed, it was used a few times and then removed and stored indoors. I believe it can be used without any problems, but please consider purchasing if you understand that these are used parts. Bike packing, Portland Design Works, camping, touring Compatible seat post diameter: 27.2-31.6mm Loading area size: Length 343mm x Width 133mm Rack total length: 432mm Rack weight: 350g Maximum load capacity: 5.3kg