Gear Ratio & Tire Size Chart

[T444E-Twinturbo]

What think of this graph
What I read on my rev counter does not correspond with this table.

My truck : F250 7.3 2001 axle ratio 3.73
Tires 265/75/16 ( 31.5" ~ 32" )
Rev counter 2050 RPM @ 65 MPH

4Lo.com :: Gear Ratio & Tire Size Chart

[countryraised]

Do you have a auto or stick? my auto in OD runs 70 mph @2000rpm with 3.73's and 265/75/16's

[T444E-Twinturbo]

Auto also, but why the difference with the graph