Tires and comments back from Joe Robinson in TM

[Padgett]

And the answer is:
"CAT Scales display and print in 20 LB increments to comply with the specifications set in NIST Handbook 44. Each of the three axle weights would round up or down to the nearest 20 LB. As an example if your steer axle weight is 11,972 LB the CAT Scale would register that weight as 11,980 LB. If the drive axle weight is 33,949 LB the CAT Scale would register that weight as 33,940 LB. "