TRUCK & TECH
REAR
Tailoring the spec to the application is key to every successful trucking venture. For metropolitan pickup and delivery, 6x2 and 8x2 units can be a compelling choice.
A
t a casual glance it can be difficult to pick the difference between 6x2 and 6x4 (and 8x2 and 8x4) trucks. While both have tandem or bogie rear axles that externally look much the same, a quick check underneath reveals either two drive axles connected by an inter-axle drive shaft 42
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(bogie-drive) if it’s a 6x4; or if it’s a 6x2 in Australia, the forward rear axle is usually the drive axle, paired with a beam axle similar to those found on trailers. This type of 6x2 is called a ‘tag’ axle arrangement. Another iteration of the 6x2 scenario, known as a ‘pusher’ axle setup, sees the drive axle at the rear and the lazy in front,
with the ‘pusher’ terminology stemming from the ‘pushing’ position of the rear drive axle behind the lazy axle. This style of truck is popular in Europe where electronically controlled air suspension enables the lazy axle to be lifted clear of the road when travelling unladen, thus further reducing tyre wear and fuel use.
