What's the minimum wheel size paired with the 2020 Silverado rotor upgrade?

[Pilot]

So I'm upgrading the brakes on my 2002 Tahoe to hydro boost and the larger 2020 Silverado rotors and calipers. Does anyone have a sense for the smallest wheel size that will fit this setup? I realize offset will be a factor.. I'm currently running 20x12 wheels with a -44 offset, but I want to downsize the wheels. Hoping I can go with 17x9, maybe even 16x9.. Any thoughts?

 

[MassHoe04]

Pretty sure 16 will not clear at all.
17 probably smallest, but that might still require slight modification to calipers (possibly grinding some material off in places).

I have not done that conversion, but I do know 16 did not allow hardly any extra room between the wheel and the stock calipers I have.

Someone who has done the conversion can answer just how small a rim you could get away with...
17 or 18 would be my guess.