clea
Member
The tires on the Beta Model S at the Bellevue store are 245R45 19 ( I don't remember the brand & type, I just recorded the size )
Goodyear Eagle RS-A2 tires in that size are 27.7 inches in diameter and the "section width" is 9.6 inches.
The official word on the tires they will be shipping with is written on the new specs page ... http://www.teslamotors.com/models/specs
19" cast aluminum wheels with all-season tires (Goodyear Eagle RS-A2 245/45R19). Note: optional 21" wheels come with Continental Extreme Contact DW 245/35R21 tires ...