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Range loss with the different wheel options

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I just stumbled on this, I have an PMY on order to replace my 2020 LR AWD. I ordered and received TSportLines 18” tire/wheel package. The tires are 245/50-ZR18 and are claimed to be 16 pounds lighter than the 21s.

How much range might I recover given the 27 mile delta from the LR AWD Y?
 
for anyone thinking of switching out their 21" to 19". here's my MYP wh/mi I was doing some testing. 50/50 freeway/hwy miles. 60s ish degree. SF Bay Area road and I do lived up the hills or my wh/mi would be a lot better!

21"' uber stock Pirelli P Zero 4 - 255/35ZR21 98W Front, 275/35R21 103W XL Rear

21": avg 289 wh/mi


19" martian wheels w/ Michelin pilot sport 4 -255/45R19

19": avg 258 wh/mi

I put in 381 miles on the 21" and Gave up trying to lower the wh/mi. So I switch them out to the 19". The drive is much better in the 19". IMO. BTW. I tried to avg 65-68 mph on HWY and 5-10 mph over speed limit on the street. AC is on. And I do step on it here and there, to beat lights or cut off slower drivers or older drivers. Also a little heavy foot on merging from getting onto the hwy.

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