Air Spring Rolling Lobe Rubber with Plastic Piston — Dual Stud & 4-Bolt Bottom

Summary: Heavy-duty rolling lobe air suspension spring designed as a direct OEM replacement. Built with durable rubber bellows and a plastic piston, it restores suspension function, enhances ride comfort, and ensures reliable performance for demanding fleet applications.

Fitment

• Application: OEM replacement suspension spring
• Side: Universal
• Designed for heavy-duty commercial vehicles

Specifications

• Part Number:
• Type: Rolling Lobe Air Spring
• Bellows Material: Rubber (Black), 1 in thickness
• Piston Material: Plastic
• Top Plate Diameter: 9 in, 2 bolt holes
• Bottom Plate Diameter: 9.75 in, 4 bolt holes
• Maximum Height: 19.88 in
• Minimum Height: 7.08 in
• Weight: 14.00 lb

OEM / Cross References

• Blue Bird: 90557038 (Non-Direct Cross)

Included

• 1 × Air Spring
• Packaging: Box
• Mounting hardware not included

Notes

• Mounting configuration: Top – 2 studs, Bottom – 4 bolts
• Rolling Lobe design with plastic piston
• Mid-range build with 19.88 in max height
• Bottom plate 9.75 in diameter offers stable fitment
• Cross-referenced to Blue Bird part 90557038
• Part of the “4-Bolt Bottom Series” in Rolling Lobe assemblies
• Verify application compatibility before purchase