Triumph customization site (link below) says you need the twin seat to fit the rear luggage rack. However, I think I have seen pictures of SS with the OEM rear rack and the RIBBED BENCH SEAT. Has anyone installed these two accessories together and can confirm and possibly post pictures of how it looks?
http://www.triumphmotorcycles.com/configurator/bike/5ea00eee-0eb1-402c-902f-4df0ef634ba7
http://www.triumphmotorcycles.com/configurator/bike/5ea00eee-0eb1-402c-902f-4df0ef634ba7