@moto111 A few more things I'll mention:
1) 18" wheels over the M3P PUP brakes are a snug fit, and not all 18" wheels fit, make sure the brand/seller promises the wheels fit. There are many known to fit, and MANY of us on these forums are running 18s on the PUP brakes, it's completely fine, but your tire shop will need to be careful with wheel weight style and placement. Thin weights only, and only along the outermost portion of the inner barrel surface, otherwise they will rub on the rear parking brake (which sticks out closer to the barrel than any other part of the brakes, front or rear). Or go with weights on the outer barrel surface (hidden inside the tire) if that's an option (I've heard it is but never had wheels balanced that way myself).
2) These are the aftermarket 18x8.5" aero wheels I mentioned that fit the M3P PUP brakes:
The EV01+ Wheels Designed for Tesla Model 3 by Fast Wheels in Canada. Created to not only look amazing on your Tesla but they are lighter than factory Tesla rims as well as more aerodynamic. Increase range with Fast Wheels EV01 and set your Tesla Model 3 apart from the rest.
www.aftermarketev.com
I've no personal experience with those EV01 wheels, but I've seen forum members post pictures of them, they seem to be legit.
If you want to put aero wheels on a new M3P, they look like the easiest and best option. Get the +35mm offset version for M3P PUP brakes of course (
not the +40mm version which is meant for the standard Model 3 brake rotor hat).
In addition to 18x8.5" they also have 19x8.5" and 19x9.5" sizes of that EV01 wheel, and other Model 3 wheels, but if you're seeking maximum efficiency get the EV01 in 18x8.5" (smallest size, and same size as the base Model 3 aero wheels).
3) These are the 18x8.5" forged wheels I'm using:
WHEEL DESCRIPTION TITAN 7 T-S5 is a fully forged wheel designed completely with performance in mind. Pressurized with 10,000 TONS of industry leading pressure to give you a wheel that is incredibly strong while giving you all of the performance attributes you need in a track focused wheel. Upon...
titan-7.com
In addition to 18x8.5" they also have 19x9", 19x9.5", 20x8.5" in M3P fitments of that T-S5 wheel, as well as some (not all) of their other wheels. Again though, if it's maximum efficiency you want, go with the smallest size, 18x8.5" (same size as the base Model 3 wheels).
You can see the T-S5 is a very open spoke design, definitely not aerodynamic like the EV01, but I still gained efficiency as mentioned, both on the highway and on curvy rural roads with lots of slowdowns + speedups for turns. My guess is having taller sidewall / shorter spokes is good for aerodynamics, and of course 18" wheels weight less - MUCH less than the uber-heavy stock 20x9" wheels! - which is surely good for acceleration + deceleration efficiency. (The taller sidewall tires can weigh a tiny bit more, but overall wheel+tire weight is always less with smaller diameter wheels / taller sidewall tire when comparing with the same wheel, and the difference is even more stark when you compare decent aftermarket wheels to the incredibly heavy M3P stock wheels.)
Titan7 made my shortlist because when they list a wheel spec as Model 3 / M3P fitment, they truly mean a direct fitment, the wheel is spec'd specifically for this car, including center bore machined for the M3P PUP "stepped lip." Some other wheel brands get this right too thankfully, but many don't, e.g. they'll advertise wheels spec'd for a Mustang (same bolt pattern, similar-ish offsets) as compatible with our cars, and you need to use rings and/or spacers to actually mount them properly (center bore is different, and the offset might be too high). Not a
big deal but I preferred wheels actually spec'd to fit this car directly, since there are such options on the market now!