underslung

adjectives

supported from above especially in a vehicle having springs attached to the axle from below
underslung
is similar to
held up or having the weight borne especially from below
"supported joints in a railroad track have ties directly under the rail ends"
supported
having a lower part projecting beyond the upper
"an underhung jaw"; "undershot bulldog"
underhung, undershot, underslung
having a low center of gravity; built low to the ground
squat, underslung