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I believe it is only the 185/70/14 Bridgestone B381 that has been tested to have a rolling resistance coefficient of .0062, same deal with the Integrity. If the diameter changes, so will the rolling resistance coefficient. Though I'm sure they will still roll quite nicely if you get them in the OEM 185/65/14 size if the only change is the diameter and not the construction of the tire.
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