Lift Calculator

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.