On 07/19/2017 01:53 PM, Bob F wrote:

But of course, that fuel economy was based on odometer readings, which
are reading 26% low with the 19" tires.

That would be a real half-assed test. It's not rocket science. Japanese
bikes are notoriously inaccurate for both speed and odometer so I use a
GPS. Harley's, strange to say, tend to be quite accurate. Unfortunately
the LED display on mine is getting hard to read unless it's hot out so I
use a $20 Sigma bicycle computer. Measure the rolling circumference of
the tire, program the computer, check it with a GPS, and you're good to go.