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Bridgestone's M-B EQXX ULRR tires
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.
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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