Commercial Truck Suspension Air Spring Continental ContiTech 66666 for Peterbilt

Product Dimensions

Dimensions - Compressed Height: 197 mm

Dimensions - Extended Height: 623 mm

Dimensions - Top Plate Diameter: 231 mm

Dimensions - Piston Diameter: 205 mm

Dimensions - Natural Diameter: 315 mm

Dimensions - Center to Center Distance: 157 mm

Screw Nuts Type: 2×3/8-16UNC

Air Connection: 1/2NPT

OEM Original Manufacturer

​​Core Role and Peterbilt Model Adaptability

AIRSUSTECH air spring model 1T0378 is a core component of rear axle air suspension designed for Peterbilt American long-head trucks (especially for main models such as 579/567/389). Its role goes beyond basic shock absorption and is directly related to vehicle stability, load efficiency and operating costs.

1. Dynamic load support

Load range:

A single spring can support 4.5~7 tons (pressure level needs to be selected according to the rear axle configuration), covering Peterbilt common working conditions:

Light load (container transportation): air pressure 0.6MPa

Heavy load (ore/wood): air pressure 0.9~1.2MPa

Adaptive leveling:

Linked with Peterbilt original height valve (such as Wabco 432020) to keep the height of the cargo compartment constant from the ground and avoid cargo tilting.

2. Improve driving safety​​

​​Problem: 1: High-speed rollover tendency
Solution: Lower the center of gravity + enhance lateral support, reduce the roll angle by 35%

Problem 2: Long wheelbase curve drag
Solution: Independent airbag pressure compensation on the rear axle to prevent the tire from leaving the ground

Problem 3: Leaf spring break risk
Solution: No metal fatigue, the precursor of rubber layer break is chronic air leakage

​​3. Protect key components​​

​​Extend the life of the axle:​​ Reduce the impact of the drive axle gear (compared with the leaf spring vibration attenuation rate ↑​​60%​​)
​​Tire protection:​​ Evenly distribute the ground pressure and reduce eccentric wear (tire life ↑​​20%​​)

Product Images

Factory Workshop