It is possible to use a 50mm or 2-inch hitch carrier or cycle carrier even with a Solex 40mm square hitch member. The distance from the center of the upper square pipe to the center of the lower square pipe is 175mm. Depending on the vehicle, this product may interfere and prevent the back door from opening during use. The nut near the hitch carrier insertion point is a nut to prevent looseness. The painted surface is not very clean. There are also some scratches, so please refrain from bidding if you are concerned. Also, please note that we may cancel bids from those with negative feedback or new users. We are not responsible for any injuries or accidents that may occur while using the product. No claims or returns are accepted.