I have a Gen2 R1S Dual Large (non Performance) and currently at 11,200 miles on the 22" Scorpion all-season tires. The tread looks to support another 13-16k miles of primarily highway driving, or ~12k mixed.
likely where a cabin exhaust flaps are located to not create pressure when closing the doors, and give air a way out when taking fresh air into the cabin.
I will be taking delivery of my R1S in a couple weeks and wonder if any other extremely tall drivers have found a comfortable neck pillow that can make the headrest a bit more tolerable. I drove the demo vehicle for only 15 minutes and found the combination of head and shoulders pushed forward...