stock tire is 195/65/15 @ 18lbs, 5.6 inch tread width. What makes this a low rolling resistance tire is the tread width. About 2 inches less tread width than any other tires in that size. The sidewall flares out to give it the 195 section width specification. That's why our cars slide/push so easily even when encountering very low speed corners, and why they have such low grip levels.
Replacing a used OEM tire which is down to 14lbs worn with a non-LRR tire @ 20 lbs.new would net you not only 40% or more wider contact patch for the same size tire not rated as the LRR tire, but an additional 6 lbs of rotating mass per corner on the car also resulting in increased effort from the ICE and IMA. That will cause you to lose several miles per gallon. So, even though the factory tires are a bit more expensive and barely grip theroad, I'll be replacing them with OEM Dunlop sp-31's when the time comes.
www.tirerack.com sells them currently for 71.00 a piece + shipping, no tax.
While you may initially save $120 on the difference in price over some less expensive tires in the same size, their wider contact patch over 40k miles will cost you an additional $325 in gas over the same time period over the factory LRR tires.
Dave (former big name tire shop manager)