Thank you for the picture of your crossbars. The interior width of the Thule SUP and Surfboard Pads # TH846000 you referenced are 11 1/4" with the pad opened. They fit most aero, elliptical and factory cross bars.
These give you 2 more inches than compared to your current ones, and by the looks of your cross bars these will work great. I also included a photo a short review video for you to check out. view full answer...
We can help you with a hitch for your Encore that will allow you to take advantage of the extra cargo space/weight capacity provided by a hitch mount cargo carrier.
Only 1-1/4-inch hitches are made for the Encore, we have the light-duty Class I hitch by Curt, # C11527, which only has a 200-lb tongue weight rating. Installation instructions and a video are linked for you. It is also a good idea to check your owner's manual to confirm the car's own tongue weight capacity which could differ... view full answer...
I reviewed an online edition of the owner's manual for your 2016 Buick Encore and on page 186 GM indicates this car is not intended to tow any trailer. I do not recommend going against this advice.
The hitch I do recommend, which would allow use of a cargo carrier like # C18145, is the Draw-Tite Class I hitch # C11527. This hitch has a 200-lb tongue weight rating so after you deduct the carrier's 29-lb weight you would still be able to load up to 171-lbs of cargo. I know this 171 lbs... view full answer...