Posted 1/1/2016 12:23 (#5002765 - in reply to #5002665) Subject: RE: John Deere 8400
SE MN
I'd bet that the 42's are 20.8's, not 18.4's in which case there would be more rubber on the ground than 18.4r46's. Many had either 20.8r42 or 18.4r46, more rubber with 20.8r42's, better for row-cropping with 18.4r46's. Both are the same height and so same for speeds and gear ratio for steer tires.
John Deere 8400
