Torque Rod | International Air Ride | 25-3/8 Inches | Large Eye

SKU TR55-418C1

  • 360 Spin Image TR55-418C1
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2 In Stock as of 9/28/2020 12:23:16 AM EST.

International Corporate Air large eye torque rod. 25-3/8 inch center-to-center. Replaces 501565C2, 3548381C1, 3580088C1 and 4C4Z4612AA. Includes TS38000 bushing.

Product Specs for Atro TR55-418C1

  • Application:International
  • Automann Number:TMR533
  • Dayton Number:345-866
  • Euclid Number:E13989
  • Flagg Number:IH22
  • Ford Number:4C4Z4612AA
  • Gaff Number:34563
  • International Number:501565C2, 3548381C1, 3580088C1, 4C4Z4612AA
  • Documentation: International Corporate Air Schematic.
  • UPC: 751354035490
  • MPN: TR55-418C1
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Atro TR55-418C1 Details

Atro torque rods are designed for greater tensile and tear strength and features forged rod eyes and a stronger mechanical v-groove weld. The unique rotating inner pin eliminates bushing wind up for reduced stress on key components. The rotation allows for easier installation.

Atro torque rods are chemically resistant against oil and cleaning solvents to provide years of service.


  • Length: 25-3/8 inch center-to-center

Contains Bushings

  • Bushing 1: TS38000
  • Bushing 2: TS38000

Qty Per Vehicle:

  • Typically 2

Cross Reference:

  • 501565C2 - Corporate Air
  • 3548381C1 - Corporate Air
  • 4C4Z4612AA - Corporate Air
  • 3580088C1

Customer Q&A - Atro TR55-418C1


ATRO Engineered Systems (ATRO) is a supplier of heavy-duty proprietary polyurethane suspension parts designed to deliver longer-lasting performance and reliability. ATRO’s free-rotation bushings with proprietary polyurethane material deliver longer life, lower cost-per-mile bushings that are superior to standard rubber or other polyurethane bushings. ATRO bushings are manufactured in the U.S.A and have proven to last three to five times longer than standard rubber and polyurethane bushings.

ATRO’s free-rotation design allows the inner piece to rotate freely, eliminating bushing “wind-up” and allowing less stress on the bushing material and ultimately the suspension components, thereby helping to prevent premature failure.

ATRO Bushings:

  • Meets or exceeds OE specifications
  • Eliminates bushing “wind-up”
  • Installs easily and requires no maintenance or grease
  • Resists contaminants such as road salt, grease, oil, acidic cleaning solvents, hydraulic fluid, diesel fuel, and more
  • Provides a longer life – up to three to five times longer than traditional rubber bushings
  • Enables the suspension to operate as designed to minimize premature part failure

ATRO Engineers Systems’ patented designs, state-of-the-art manufacturing plant and extensive aftermarket distribution network make them an industry leader developing products which improve performance, eliminate downtime, and help control costs.

Atro Warranty

The Atro warranty covers polyurethane to metal de-bonding, loose fit of internal components or signs of wear that will lead to premature failure under normal use for the time periods listed below.

3 Year Warranty

On all Atro products with the following exceptions noted below.

2 Year Warranty

On 2” eye torque rods.

1 Year Warranty

On LP50 Series Hendrickson pads and equalizers.

No Warranty

Atro does not offer warranty coverage on installation tools

What the warranty does not cover

Any warranty is void if product condition shows signs of overloading or improper application. Mixing rubber bushings and Atro bushings on the same application voids all warranties. You can view the full details of Atro’s warranty here.

How to get service

Atro handles all of its warranty claims, please contact ATRO customer service by phone at 1-800-325-6114 for approval and to obtain an RMA#.

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