Tires & RPM Help

[Rembrant]

Dyn Blin wrote

Since I got home, although I really don't notice much change in clutch feel getting it rolling unloaded.  City mileage has stayed the same- I expected a bit of drop with the increase in contact patch and resistance.  Highway has seen roughly a 10% improvement in mean MPG, and I hope to see a bit more all things equal when spring sees the return of the better gas.

10% is nothing to sneeze at. That's a decent improvement in my books.

[Dyn Blin]

I was surprised to see how much of an affect it has in that 55-65 MPH range.  Although there's likely an influence of simply having new tread, too.

[Gary Lewis]

Good report.  

I'm sure you've accounted for the fact that you are going ~10% further each revolution in your calc's - right?

As for "I'm usually in the left lane with the big rigs at an easier pace", is that the Limey showing through?  

[Dyn Blin]

Is that why there were so many people around me cursing?  

And here I thought they were waving their fists in blue oval solidarity...

Yes, intuitively I figured that once I had the girl rolling, the distance per revolution would have an effect, but I also figured the extra inch and half in height and increased contact patch would create enough resistance to mitigate the gains.

I'm often wrong, but in this case, happy to be.

[Gary Lewis]