What is a tag axle?

Tag Axle. An auxiliary axle installed in conjunction with the rear axle(s) of a truck chassis. A tag axle is installed behind the rearmost axle, thus extending the length of the wheelbase. See Tandem Axle.

Is a tag axle driven?

A tag axle is a non driven third axle. It sits directly behind the drive axle, effectively tagging along – hence the name tag axle. A motorhome tag axle allows the motorhome to be much longer. There will be more room in a tag axle and it will be able to carry much more weight.

What is tag axle on truck?

A tag axle is where the rear-most drive axle is non-powered, also referred to as a free-rolling or dead axle. A pusher axle is where the forward-most drive axle is not powered. The tag axle has been the most common.

What are tag tires?

“A membership group of major, regional tire and automotive service retailers” The Tire Alliance Group (TAG) is North America’s leading Strategic Alliance of Premier Independent Tire Dealers.

What does tag dump mean?

The TAG DUMP switch allows an operator to exhaust the air bags on the tag axle which, under certain conditions, may improve manueverability. In AUTO mode, the tag axle air bags will automatically deflate when in reverse and when the speed of the vehicle is less than 8 mph.

What is the purpose of a pusher axle?

A pusher axle adds stability to the truck’s chassis during cornering and takes some of the weight from the tandem and steering axle but can make it difficult to get the maximum allowable weight on the truck’s front axle.

Is a tag axle a lift axle?

Lift axles can appear on both a trailer and tractor unit. If the lift axle on a trailer is the rearmost axle, it’s called a tag axle. Often, these axles passively steer (‘rear-steer’) to reduce scrubbing around corners.

How many tires does a bus have?

Normally 4, 2 in the front, 2 in the rear. Could be 6, 2 in the front, 4 in the rear (2 axles in the rear) – depending on legal requirements. I think the most is 8, on very few busses – those that have 4 axles. Spare tires are not counted.

How does a steering tag axle work?

A steerable tag transfers the rear pivot point to the center of the drive axle. An aired up or unloaded tag also transfers the pivot to the drive axle center. There is no tighter a radius turn with either.