Anyone running 19” wheels?

Can you define "work" here?
If you mean work in terms of the required dimensions, I agree. If you mean visually...I don't think so. With our cars, anything bigger than 18" can make them look like a horse-drawn carriage or "donk" ... but this is a matter of personal taste and you did manage to find a couple of examples that pull off the look.

That Duster with the 20s...woof. Not for me, thanks.

Yes, by "work" I meant will actually bolt up and go down the road with a reasonable sized tire. There are tons of wheels out there that will physically fit. Especially if you step back from using 275's or 255's up front. Step down to an 18x8" with a 245/40/18 up front and there's all kinds of rims that will fit.

Whether or not they fit your limited opinion of what you think looks good is your problem. If you're looking for 18x9's or 9.5's up front to run 255's or 275's, then you're somewhat more limited, but even then you still have more options than if you run 14's or 15's. I mean seriously, what do people run? Rallye's, magnums, oe steel, police wheels, cragars, torque thrusts, or those god-awful centerlines. I bet those styles account for well over 90% of the wheels being used on these cars. That's what, 7 styles?

Personally if I wanted to go 18x8 and 245/40/18's there's at least a dozen different wheels I would be totally happy to run on my car. My list gets cut down by the 10" or wider wheels I run in the back, and the fairly narrow offset range I have to use to run 275's up front and 295's out back. But I like a bunch of the "tuner" style wheels, as evidenced by the Enkei RPF1's I run now. If you're stuck in the 70's with your wheel design you don't have as many options.

I actually don't mind the Duster with 20's. The front actually looks ok to me. In the back that big deep set rim lip is what turns me off, but with a different style wheel back there I think it could work, throw a wider B-body rear axle in that thing and get rid of that lip and it'd be a totally different look.

Yes. It definitely does depend on the package! Generally speaking, larger diameter wheel packages will add weight. It's not helpful to compare steel police car wheels to modern aluminum wheels so that comment was pretty silly. My cheap 15x8 wheels (rear) shaved ~2kg per wheel compared with the stock 15x7 Rally wheels, including the mass of the wider rubber.

I've spent most of my driving miles behind the wheel of modded Miatas and the one thing that experience drilled into my head was that unsprung mass is not to be overlooked. Yes, the ~100rwhp Miata needed all the help it could get but so does a car handicapped by the considerable mass of the solid rear axle. Every kg helps.

I don't think it's silly at all to compare the weight of the police rims to modern aluminum wheels. That's the swap I actually made, so it's relevant.

As for the combinations, with tires, I weighed mine before I installed them. Even running 275's and 295's on 18x9's and 18x10's I shed weight compared to the 15x7's with 225/60/15's. Now, the police rims are on the heavy side for OE type wheels, but then the difference in tire width was also really extreme. A 255/60/15 weighs in at 31 lbs, the 225/60/15 is only 25 lbs. Which means going from a 255/60/15 on a 15x7" police wheel to a 295/35/18 on an 18x10" RPF1 would save around 6 and half pounds. That's a lot of unsprung mass. And even worse, it's rotational mass. It also means the wider 295/35/18 tire weighs about the same as the 255/60/15 tire, the 15" tires are heavier for a given width than the 18's. A 275/60/15 BFG T/A weighs 36 lbs, most of the 275/35/18 tires weigh 25-30 lbs. 19's aren't that different for tire weight, so, even if you add some rim weight you can still come out ahead than a lot of 15" wheel and tire combo's.

tireweights_zpsf3d39dce.jpg