ASL4012A — Sleeve Air Spring

This sleeve air spring assembly is a common component in aftermarket rear air suspension kits across a range of commercial and light commercial vehicles. The listing covers the most widely fitted configuration — piston and top plate assembly — though alternative mounting configurations exist across applications. Buyers should verify their mounting arrangement before ordering.
 
The spring has been used extensively in Drive-Rite rear air suspension kits and appears in aftermarket solutions for Mercedes-Benz Sprinter and Fiat Ducato X250 applications, including as a component in rear full-air conversion systems.
 
Specifications
Type: Sleeve air spring
Sleeve length: 330mm
Maximum OD: 180mm
Free height (at 20psi): measured top of cap to bottom lower swage = 340mm
 
Cross-references
Some of the references below may relate to the bellows component only. Mounting configurations vary across applications — buyers should confirm their assembly type before ordering.

Firestone W21-760-9255 · W26-D60-9051 · 140/95 · 2000/24
Contitech SK085-137 · SK085/137 · SK085-137-363-01
Drive-Rite W21-760-9255 · DR07019051 · DR.07.019051
Sampa 205.413-01 · SP559051-KP
Pega P40.085137.01
Mercedes-Benz A9063280001 · A9063280101
Other references 0062030040 · 1050221200 · 1052032260 · 1052032500 · 1052032501

Type: Sleeve air spring
Max height: 395mm
Standing width: 150mm
Sleeve length: 330mm
Max OD: 180mm
Top plate diameter: 147mm
Top offset: 70mm Piston diameter: 72mm
Piston height: 60mm
Top mountings: 2× M6, 2× M8×1.25
Top air connector: 1/8 NPT
Piston mounting: 3/8 UNC Bolt circle: 120mm