It is possible to use a 50mm or 2-inch hitch carrier or bicycle carrier even with a Solex 40mm square hitch member. The insertion opening of the hitch carrier is inclined by approximately 3 degrees. The nut near the insertion opening of the hitch carrier is a nut to prevent play. Please refrain from purchasing if you are concerned about uneven paint or slight scratches. We are not responsible for any injuries or accidents that may occur while using the product.