a dead axle situated behind a drive axle
In a group of rear axles, the forward-most axle is a driving type and the rearmost axle is a free rolling (load carrying only) commonly called "dead axle."
Extra axle fitted behind the drive axle of a tractor unit or rigid vehicle. Can usually be lifted clear of the road when not required.
A non-drive axle located behind the rear drive axle that is used to support the weight of the RVs overhang.
Nonpowered rear axle located behind a drive axle.