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(888) 312-8812 Login SignupHeavier-duty suspension applications call for the Firestone Suspension Air Spring, whose piston and bellows combination handles higher operating pressure without sacrificing the service life lighter-duty springs achieve. The 1T15M line is built around that higher pressure range specifically, rather than being a scaled-up version of a lighter-duty design. The Firestone W013589922 uses a 7.5 piston designation, matching the stroke and diameter the heavier application requires. Correct piston sizing for that higher pressure range keeps the bellows material operating within its engineered limits long-term.
| Brand | Part Number |
|---|---|
| FIW013589922 | |
| CONTITECH | 910175P428, AS9922, 64399 |
| FIRESTONE | 1T15M-8, 1T15M-7.5 |
| GOODYEAR PART | 1R12-911 |
| HOLLAND (NEWAY) | 905-57-119 |
| MERITOR | FS9922 |
| PISTON | 9540 |
| TOP PLATE | 3235 |
| TRIANGLE BELLOWS | 6391 |
| TRIANGLE PART | 8428 |
| TRIANGLE SUSPENSION | AS-8428 |
| WORLD AMERICAN | WA01-9922C |
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Headquartered in Nashville, Tennessee, Firestone Industrial Products® is a proud manufacturer of air spring and other anti-vibration solutions to heavy duty trucks, trailers, commercial vehicles, rail cars, and industrial equipment. It has come a long way since it revolutionized transportation with the introduction of the Airide™ Air Spring in 1938. Today, Firestone is more than just an air spring manufacturer—it’s a global leader and a local partner that sees solutions where others see obstacles. Both OEMs and everyday consumers trust this brand for their air suspension needs because of its unwavering commitment to quality and reliability. All Firestone parts are engineered and tested in ISO-certified facilities to ensure they meet the strictest standards and customer specifications.
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