[10-1-100]

Assuming you have the 20 inch performance wheels (and the Pilot 4S summer tires that come with them), those could be the difference between you getting 325Wh/mi and something more in line with 250-275 at 70mph.

Here's a chart with speed/efficiency measurements for most Tesla model/wheel configurations:

https://teslike.com/

[natch]

Yep that's part of why I put 18" wheels on my P+ even though they don't look as nice as the 20" wheels.

[rootusrootus]

That is entirely possible. When I drive out of my driveway and down the road, it sounds like the tires are ripping the asphalt off the road and flinging at the underside of the car. Sticky things.

In the winter I run snow tires, but then there's the low temperature and corresponding use of the climate control that destroys range. And in the summer I've got the performance wheels and tires installed. So I'll never see optimal range. But Tesla probably shouldn't be quoting 300+ miles of range for the Performance model, either.

Given the climate where I live is pretty mild, and snow is relatively rare and short-lived, I've given some consideration to ditching the performance tires and snow tires both and replacing with 19 inch Conti DWS to run year-round. If I got away with that on my Camaro, it would probably work on my AWD Tesla, LOL.

[10-1-100]

Late response but, to Tesla's (slight) credit, they now advertise the performance (with 20" wheels) at 299 miles, and that's in comparison to the 2020 improvements that bumped the advertised range for LR AWD to 322 miles (from 310), so at least now expectations should be a bit more clear for new buyers.

Yeah, I'd imagine running all seasons on 19s or 18s ought to be fine, especially with the killer traction control... This would be my plan in the event I were getting a P3D (trying to hold out for Cybertruck...)

P.s., the way you describe the summer tires ripping up the pavement gave me a chuckle - I'll have to remember that next time I'm talking to someone about the difference with the summer tires!