BMW UK says the new electric i3 electric “defines the car of tomorrow”, a sizable claim backed up by exclusive tire supplier Bridgestone, who describes the i3 as representing a “milestone in automotive history”. With a lithium-ion battery that offers a range of 80 to 100 miles, the i3 is by BMW UK’s admission ideally suited to urban driving.
The tires designed specifically for fitment on the i3 required, says Bridgestone, the adoption of an entirely new concept. The answer was something it calls ‘ologic technology’. As seen in the “Large & Narrow” concept tire shown at last year’s Geneva motor show, ologic technology capitalizes on the synergies of a large diameter coupled with a narrow width and tread design. Bridgestone says such tire dimensions significantly improve aerodynamics and rolling resistance while offering outstanding wet grip, a claim it bases on the results of comparative tests (using a size 155/55 R19 tire against 205/50 R18 and 175/65 R15 fitments) carried out at its Tochigi proving ground in Japan in 2011.
Released together with the BMW i3 in November 2013, the Ecopia EP500 ologic tire is available in four sizes – 155/70 R19 84Q, 175/60 R19 86Q, 155/60 R20 80Q and 175/55 R20 85Q – and two winter varieties – the Blizzak LM-500 ologic and the studless Nordic-conditions Blizzak NV ologic.
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Source Tire Review