The rim is tubeless (clincher), and is aerodynamically optimized for 25-28c tires.
XDR because 12 is bigger than 11.
More photos here: https://imgur.com/a/AhcGtle
ENVE 45 rims 700c 21mm internal width Aero optimized for 25-28mm tires ENVE alloy disc Centerlock hubs
100x12 front / 142x12 rear SRAM XDR Driver (12 speed)
Sapim bladed spokes
1566 grams (723 g front / 843 g rear)
Includes rim tape, valves, sticker, and user manual.
$1500 is the cash price. Buyer pays transaction fees (optional) and insured shipping (or local pickup in Boulder, CO).