Practical calculators and references built to support better decisions on the road, in the yard, and at the desk.
Axle / 5th Wheel Shift Estimator
Estimate how weight shifts when you slide tandems (by inches or by holes) or slide the 5th wheel (by inches). Results are estimates—confirm on a certified scale.
Use negative holes to slide the opposite direction.
Default is set automatically when using “Holes”. You can override if your setup behaves differently.
Tandems sign convention: Positive movement assumes sliding tandems toward the rear,
which typically adds weight to trailer and removes weight from drives.
Disclaimer: Estimates only. Confirm with a certified scale.