Why not go with one of the 4 tire inflator/deflator kits? This seems way more convenient to both air down and air up.
https://thorslightningairsystems.com/products/thors-lightning-rapid-4-tire-air-system
Not really an answer based upon experience driving my R1S as I just got it but I am getting snow tires for sure. I have the 20 inch wheels and will likely get the Winterforce. If I had the 21's I would get a set of 20 inch winter wheels with tires.
Respectfully disagree it is way more forceful than engine braking unless you were to do something very aggressive like drop it from 6th gear to second in a manual.
I have only driven my vehicle for approximately 800 miles so take my opinion with that grain of salt.
I feel that the one foot driving in the vehicle is more difficult than my wife's Tesla. You have to really feather the pedal gently otherwise the transitions from acceleration to braking feels...
A nice surround for the hitch opening after the cover is removed that allows the hitch and plug to be used. Having the cover off looks unfinished but replacing the cover all the time is a pain in the backside.
Do you need the spacer? It looks like the tire/wheel would fit without it and it would sit closer to the vehicle plus be less likely to move.
Also, does the lower tailgate clear the cross bar?
I wonder if a light bar with dual function would work in that area. There are a couple that make bars that have amber on the sides and white for the center. That would be really practical and your switch set up would simplify the install.
That's exactly what I was thinking of. I'd be interested to hear more about the installation. I assume that you are wired directly to the 12 volt battery.
Like the previous poster I was going to say, build a small shed with solar on top and batteries inside at your property entrance. It will be useful for any EV or even if you wanted to drive a camper up you could plug it in.