This thread is about the 8.5” wheel, either way. You’re wrong. Do some research on EV range and weight.
Wow. It's almost like I haven't spent the last six years of my life working in engineering with electric vehicles.
How about we look at the facts, which you clearly like to ignore.
First of all, the Model Y 21" Uberturbine front wheel and tire assembly is 66.6lbs each. The rear is 70.8lbs each. I literally weighed mine (brand-new) two weeks ago, so I am confident in these weights.
The 19x8.5" TSV is 29.55lbs. The 255/45/19R Continental DWS06 is 27lbs per Tire Rack. Add in the weight of the TPMS Sensor and the average wheel weights (1lb) and your total assembly is roughly 57.55lbs. So, you are saving 9.05lbs per front assembly and 13.25lbs per rear assembly. For a net total savings of 44.6lbs. Which is, again, nowhere near the "100lbs" you claimed.
Reducing rotational weight can help with improving acceleration, all else being equal. However, it has nearly no impact on range. This is because, once moving, the amount of energy required to keep the lower rotational weight rotating is offset by the increase in momentum/inertia. Therefore, unless you are planning to accelerate and decelerate rapidly and continuously while driving, which would be in contrast to the way 99% of people drive, it makes no real-world difference.
Additionally, while it may take slightly less energy to get the vehicle up to speed, it also results in less energy being recaptured during regenerative braking, and more friction losses from the conventional braking system.
Do you really think that Tesla would have overlooked wheel weight if it made a difference? There's a reason why they focus on the aerodynamic profile on the wheel, while basically completely ignoring the weight of the wheel. Tesla's wheels are very heavy. If they could increase range by 5% by putting on a wheel that is 20% lighter of course they would have already done that a long time ago. They're not dumb.
Of course, any company selling aftermarket Tesla wheels is going to tell you that it makes a big difference in range, they're literally incentivized to sell you wheels, that's their business.
In conclusion, you might in ideal circumstances notice a 1% improvement in range with these lighter wheels. Because, at the end of the day, you are saving almost precisely 1% of the overall weight of the vehicle. I will
stress, again, that tire selection is far and away the most important factor in determining range when it comes to wheel and tire selection. To be clear, I am not saying that the weight makes NO difference, but it is very close to nothing, and would not impact real-world usability in any way.
The 18" Michelin MXM4 on the Model 3 was an incredibly efficient tire, though fairly poor in every other measurable regard.
Here is a decent article on the subject:
Wheel Weight – Does it Matter? – All EV Info
@Knightshade - feel free to add your input.