gen2 to gen3

[roxy1]

Originally Posted by nookandcrannycar

Do you think the narrower tires on your 3rd Gen account for the up to couple MPG improvement over (a few cars ago, as you mentioned) your 2nd Gen Yaris ? (The search I did indicated they have the same relatively slippery CD number...and that there is only a 5 lb weight difference)

maybe. a little less weight to turn and im pretty sure they have pretty low rolling resistance. it also seems like my 07 ran just a touch higher rpms on the highway. even a very small improvement in coefficient of drag can make a difference.

I know I will not go through another winter with these awful, awful, awful tires. did I mention they were awful?

[nookandcrannycar]

Originally Posted by roxy1

maybe. a little less weight to turn and im pretty sure they have pretty low rolling resistance. it also seems like my 07 ran just a touch higher rpms on the highway. even a very small improvement in coefficient of drag can make a difference.

I know I will not go through another winter with these

Good point. Even with the 07 Model Year different tire sizes were available from the factory, so (re both 07 and 14) I wonder what size tires and wheels were used during the test?....or...Is the factory quoting the CD for just the body (not with any tires/wheels) ?

I know I will not go through another winter with these awful, awful, awful tires. did I mention they were awful?