My AGT with 20" wheels should be arriving in the next week or two. I've not seen separate tire offerings for the lucid 20" tire--perhaps because it is still too new. After waiting for almost a year, I figured that by now (toward the end of 4th Qtr 2022), Lucid would have at least one sanctioned all season radial or winter tire alternative for the 20" wheels. My plan was/is to use the stock 20" wheels as my winter set and go aftermarket with a customized 20" or 21" setup in the next year or two--something similar to what I did with my Model S in 2013. With snow on the ground now (upper Midwest), not sure if my plan will work unless I let my AGT sit this winter in the garage and try again next year when hopefully more all-season/winter tire selections will be available.
Notwithstanding the availability of separate tire selections for the stock 20" wheels, I do see aftermarket 20" tire/wheel combos for the Lucid (
https://evsportline.com/products/ts5-lucid-air-20-inch-wheel-and-winter-tire-package-set-of-4), where they list Michelin CrossClimate2 (All Weather Snow Rated) Tires and Pirelli Sottozero 3 Winter Tires as two alternatives for the Lucid. Presumably, they've checked the load bearing capacity of the tires. I will likely do the homework later this week to confirm, but would welcome input from others who have assembled the relevant data or have other suggestions.