[Vekke]

I just bougth yesterday my next efficiency test tires. They are Continental ContiEcoContact 5 in size 195/55 R20 95H XL. That means they have A rolling resistance. Many brands to choose for A level RR in this size.
- They are narrow so drag is lower.
- They are tall which also lowers RR

They can be fit to cars like Tesla Model S or Model Y, Audi A8D3 etc. I think best fit would be the a8 model weigth wise, but my plan is to test them on Tesla Model S. Estimated energy consumption reduction is 15-20% on the model S.
10% comes from aero of tire (width 195 vs 245 on Model S)
5% comes from lower RR
5% comes from aerodynamic wheels
I am at the moment searhing the best wheels to buy for the test. I have found a nice option for later use if and when the test works like I have estimated.

Minor problem is that maximum rear axle mass is 1500kg which is little bit more what the wheels or tires can at the moment handle. But if you know that then there is no problem to use these in model S.