Technical sheet

Suspension type

Air tandem front suspension (replaces chassis OEM suspension)

Load capacity

AMS20A: 12000 / 14600 / 16000 / 18000 / 20000 lbs. (5445 / 6600 / 7250 / 8180 / 9070 kg) AMS40A: 29200 / 32000 / 36000 / 40000 lbs. (13200 / 14500 / 16320 / 18140 kg)

Axle type

I-beam steer axle

Axle load capacity

AMS20A: 12000 / 14600 / 16000 / 18000 / 20000 lbs. (5445 / 6600 / 7250 / 8160 / 9070 kg) AMS40A: 14600 / 16000 / 18000 / 20000 lbs. (6600 / 7250 / 8160 / 9070 kg)

Axle spacing

60” to 145” (1626 mm to 3683 mm) (Note 1 & 2)

Brakes

(16.5 X 6 / 16.5 X 7) S-Cam air, Auto slack adjuster (ABS)

Hub type

Hub pilot, Spoke

Wheel type (rims)

(8 ¼”, 9”, 12 ¼”, 13”) Steel or aluminum

Tire size

11R22.5 / 315/80R22.5 / 385/65R22.5 / 425/65R22.5 / 445/65R22.5

Steering

AMS20A: Chassis OEM AMS40A: Mechanical, hydraulically assisted

Turning radius

Retains same radius as original equipment

Total weight (Suspension, Axle, wheels and Tires)

AMS20A: No significant weight difference with the OEM suspension it replaces AMS40A: Approx. 2450 lbs. - 1100 kg

1. Depending on make and model of vehicle
2. Varies depending on chassis make/model and ATD / DPF option / location
3. Varies depending on front axle spacing

Modifying heavy trucks has never been easier or flexible.

Simard Suspensions offers all-wheel drive conversions for heavy-duty trucks.

Our custom-engineered AWD conversions can be carried out on any medium and heavy-duty chassis.

As a certified installer with all North American axle and transfer case suppliers, we work with the components of your choice.

Want to learn more about our AMS40A and AMS20A air tandem front suspensions for vocational trucks?

Get more information about our air tandem front suspensions

Simard Suspensions’ AMS40A and AMS20A air tandem front suspensions for heavy-trucks offer maximum robustness and durability for the most demanding, heavy work.