I asked this very question to the Lucid reps at Pebble Beach during car week.. They did not give me the exact weights but they said the glass roof was quite a bit heavier than the aluminum, they also said that each battery module weighs 110 pounds, the Pure and Touring will have 4 fewer modules than the GT so that is 440 pounds lighter (curb weight). That along with the aluminum roof is perhaps why the range is now higher than originally announced since the car is probably well over 500 pounds lighter. I'm hoping that the Pure/Touring has a GVW of over 6000 pounds. Allot will depend if they add that 500+ pounds of saved curb weight to the payload capacity, which will bring the GVR up to 6200#'s like the GT, which is what I am hoping for..