For your 2015 Crossroads Carriage 40RE 5th wheel camper with a flange to flange measurement of 13' 4"(160"), you will want the Solera RV Slide-Out Awning White # LCV000163301. The flange to flange is the widest points on the slide on the outside of your camper. This slide topper uses a fabric that is 13' 7"(163") wide and the hardware will stick out another 2-1/2" on each side. The information I am providing you is directly from the Solera guide for selecting the correct topper. I do know... view full answer...