>>1982674>what poorfag rear rack is gud?what you want is lower arms that are not adjustable, like on the right
it's also nice to have dual top rails like on the left, which means you can run panniers lower and not mire the racktop.
Also on the left you see a disc rack, which has recessed lower bolts. This is bad unless you need it to get around your discs, because it makes the rack harder the tighten, and if you strip out the bolt heads, harder to remove.
You also don't want a rack which is excessively wide for the stance of your bike.
Really the poorfag rack is a used one, there are a lot floating round.