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Lift and Tow Performance Calculator

 Tow Truck Input Data (fill in all Light blue boxes)
A. Unladen Front Axle Weight: lbs Scale weight of front steering axle
B. Unladen Rear Axle Weight: lbs Scale weight of rear axle(s)
C. Total Tow Truck Weight: lbs Total scale weight of tow truck
D. Wheelbase: inches Centre of front axle to centre line of rear drive axle(s)
E. After Frame: inches Centre of rear most axle to tailboard
F. Rear Axle Spread (enter 0 if single axle): inches Centre to centre of rear axle(s)
Note: Front and rear axle weights will vary with the amount of fuel in tanks and equipment in tool compartments. Fuel tanks should be full when recording weights.
 Underlift Input Data (fill in all light blue boxes)
  X. UnderLift
Retracted
Y. UnderLift
Mid Way
Z. UnderLift
Full Extension
 UnderLift Reach from Tailboard (inches):
 Lift and Tow Performance Results
  UnderLift
Retracted
UnderLift
Mid Way
UnderLift
Full Extension
 Max lift for 30% front axle weight retention  lbs  lbs  lbs
 Max lift for 50% front axle weight retention  lbs  lbs  lbs

1) Calculations are for estimating purposes only.
2) Results may vary with different types of rear suspension on Tow Truck and Towed Vehicle.
3) Based on ideal conditions.