"Radius arms" refers to the suspension component in a vehicle that helps it maintain stability and control by connecting the axle to the chassis. Full definition
Conventional leaf springs handle suspension duties in the rear with coil springs and radius arms locating the front axle as before. (Autoweek.com)
The front suspension is by classical upper and lower control arms with coil - over dampers; there's a transverse top link, a lower control arm, two long radius arms, and coil - overs at the back. (automobilemag.com)
On - Road When the 2500 models swapped over to the new radius arm front suspension (Ram calls it a three - link), the goal was to reduce body roll and increase roll stiffness — we can tell you firsthand, it works perfectly at just that. (fourwheeler.com)