Goodyear 579923530 Air Spring — SABO Double Convoluted with Bump Stop (ASL2086A)

A SABO replacement double convoluted air spring with internal bump stop, most reliably identified by the Goodyear 579923530 reference. The internal bump stop is a hidden safety feature that prevents the spring compressing beyond a set point if air pressure is lost.
 
Identifying this spring:
 
This part is most commonly recognised in the field by its Goodyear 579923530 number rather than the Firestone or Contitech equivalents. Externally similar to the Firestone 6693, but distinguished by the integrated internal bump stop and additional base mounting holes. If your existing spring matches the Goodyear reference, this is the correct replacement.
 
A note on internal bump stops: The bump stop sits inside the bellow and is not visible from the outside — externally this assembly looks similar to non-bump-stop variants. Always confirm via the part number rather than visual inspection alone.
 
Key cross-references: Goodyear 579923530 | Drive-Rite DR.07.016693 | SABO ED.185-854/1 / SA520438/1 | OnAir ASL2086A
 
Technical Specifications:
Top air connector: 1/4 BSP
Top mounting: M10 x 1.5
Piston mounting: M10 x 1.5
Top plate diameter: 135mm
Piston diameter: 135mm
Top offset: 35mm
Top mounting distance: 70mm
Piston mounting distance: 35mm
Min height: 75mm
Max height: 256mm
Standing width new: 185mm
Construction: Double convoluted with internal bump stop
Supplied as: SABO equivalent
 
Always verify your existing part number before ordering. Contact our team if you are unsure whether this is the correct replacement for your application.