Rolling Resistance Coefficient

[aerohead]

Another necessary parameter for the discussion on BEV mass and regenerative braking.
HINT: Just as one may double the projected frontal area of any vehicle, while maintaining a constant drag, simply by halving the coefficient of aerodynamic drag, so goes for added mass and rolling resistance.
Both are 'coefficient phenomena.'
https://www.engineeringtoolbox.com/r...ce-d_1303.html

[aerohead]

The 2022, 620-mile range EQXX runs on a set of 185/55 R20 ultra-low-rolling- resistance Bridgestone tires designed and manufactured specifically for this single vehicle, as Goodyear did for GM's Impact/ EV1, and Ultralite, in 1987 and 1992, respectively.

There are professional European Rubber Journal and other sources for specifics on this tire, but their all pay-walled.
From the preliminary data M-B provided for the EQXX, I reverse-engineered an approximate Cfrr 0.00287 for the tire.
Since 2003, Bridgestone has manufactured the Ecopia with Cfrr 0.005.