Wheelbase on heavy 3 axle trucks is measured from the center of the steer axle (1st axle) to the trunnion, or the midpoint BETWEEN the 2 drive axles (axles 2 and 3), not to the center of the rear drive axle (axle 3). Axle to axle is only used on 2 axle trucks. Note: be careful using wheelbase to calculate bridge laws, which can use 1st axle to 3rd axle measurements in its calculation depending on the state/province.
Centre of the steer axle hub to the centre of the rear drive axle hub.
That depends on the wheelbase of the power unit.
An easy way to measure is to put a tape measure in the middle of the front wheel and run it back to the middle of the rear wheel. That would be your wheelbase.
Measure from the Center of the front wheel to the centrer of the rear wheel
Traditionally, longer wheelbase trucks ride smoother and are more stable in inclement road conditions, whereas short wheelbase trucks turn easier.
Depends on what you want out of it. If you can't back up very well or you have to squeeze into really tight spaces, you probably want a shorter wheelbase truck. If you want a better ride, and more stability on slick roads, you'd want a longer wheelbase.
They had a short wheel base truck and a long wheel base truck. The short bed truck had a 115" wheelbase. The long bed truck had a 127" wheelbase.
Varies according to wheelbase of the power unit, and the bridge length between the drive axles and trailer axles.
For Class 8 truck pulling a 53' trailer, you can expect the length to typically be between 60 and 80 feet, depending on the wheelbase and hood extension of the power unit. With a Volvo VNL730 (with a 233 inch wheelbase) and 48' flatbed with the fifth wheel slid all the way to the rear, I measure out around 67 feet. With a Kenworth W900L (with a 270 inch wheelbase) and a 53' stepdeck trailer and the fifth wheel centred, I measured about 78 feet.
You can do it either way.
From the center of steer axle to center of rear axle on trailer. If you want just the truck it's the center of steer axle to center of rear drive axle.
inch
As a standard factory model, the Kenworth W900L can have a 270 inch wheelbase. Trucks longer than this are custom ordered, and have the large ICT sleepers added as an aftermarket option.