SABO 9000 Air Spring — Firestone W21-760-9000 (ASL4004A / ASL4004R)

SABO 9000 Air Spring — Firestone W21-760-9000 (ASL4004A / ASL4004R)
 
A single sleeve air spring used across a range of 4-corner air suspension systems, most commonly found in the rear-of-rear position on 4-bag setups including Gliderite AD installations. Also found in commercial and industrial applications including the Douglas Tugmaster shunter. Supplied as a complete crimped assembly — top plate, piston and sleeve are permanently joined and not detachable.
 
The rubber sleeve length is 260mm — this is a key identifying feature of the 9000. If your existing spring has a different sleeve length it is likely a different variant in the same series and may require a different replacement part. For the front-of-rear position on the same 4-bag system, see ASL4002A / ASL4002R — SABO 9002.
 
Available in two variants:
 
ASL4004A — SABO equivalent. A direct OE replacement for the Firestone original. UK stock held.
ASL4004R — Firestone OEM original. For those requiring a genuine branded replacement.
 
Both variants are direct replacements for the Firestone W21-760-9000 and SABO IC9000 references.
 
Key cross-references: Firestone 9000, W21-760-9000 | SABO IC9000 (SA520656) | Contitech SK68-15P01, SK68-15P11 | Drive-Rite DR.07.019000 | Gliderite AD rear air spring | OnAir ASL4004A / ASL4004R
 
Air fitting: 1/4 NPT Sleeve length: 260mm Construction: Single sleeve — complete crimped assembly (top plate, piston and sleeve permanently joined) Available as: SABO equivalent (ASL4004A) or Firestone OEM (ASL4004R)
 
Some of the above references may relate to the bellow component only. Always check your existing top and bottom plate mounting configurations before ordering, or contact our team if you are unsure.