DustinT
Member
My 21" wheels don't increase my consumption. They're square so folks with wider 21" wheels in the rear probably do see increased consumption.
There's two factors that lead to increased consumption from the larger, performance wheels. One, the increased weight leads to increased rotational mass. You can look into this on your own, but it's quite well proven that this requires additional energy to spin. Not all of that energy is recovered during regeneration thus overall consumption is higher. Second, these wheels are designed to increase airflow to the braking system for cooling purposes. The energy to cool the brakes is not free.
There's an old saying, your mileage may vary, and it's certainly true with Teslas. How you drive is the biggest factor, but certainly the weight of the wheels can not be ignored.