.13 Suspension (Springs and Shocks).

A. Springs and Suspension Assemblies. Springs and suspension assemblies shall be:

(1) Of ample resiliency under all load conditions;

(2) Able to sustain the loaded vehicle without evidence of overload; and

(3) Designated to carry their proportional share of gross vehicle weight.

B. Rear Springs. Rear springs shall be of a progressive type.

C. Front Springs. If leaf-type front springs are used, the stationary eyes shall be protected by a full wrapped leaf in addition to the main leaf.

D. Shock Absorbers. Two front and two rear double acting shock absorbers compatible with the manufacturer's rated axle capacity shall be provided.