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Forged Chromoly Tie Rod Upgrade That Outlasts Stock Components on Any Trail
The ICON ICO55166 XD Tie Rod Kit is a complete forged and CNC-machined steering tie rod upgrade for the 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser. Engineered specifically for trucks running larger tires and aggressive off-road terrain, the ICO55166 replaces both the inner and outer tie rod assemblies with components built from 4140 chromoly and forged steel, delivering a 12% larger thread diameter than the factory Tacoma-sourced units and metal-on-metal bearing surfaces that eliminate the plastic inner race weakness found in stock components. With greaseable outer tie rod ends, factory-compatible wheel offsets, and included inner tie rod boots, the ICO55166 is backed by ICON's limited lifetime warranty and designed for enthusiasts who need a steering system capable of keeping pace with a heavily modified suspension.
Key Features
- ICO55166 XD complete tie rod kit for 2010-2024 Toyota 4Runner and 2010-2014 FJ Cruiser
- Inner tie rod and ball stud CNC machined from 4140 chromoly for superior strength over OE units
- Forged steel outer tie rod ends match the factory profile for compatibility with all stock and most aftermarket wheels
- 12% larger adjustment thread diameter than stock for increased thread engagement and durability
- Metal-on-metal ball joint design eliminates the plastic inner race failure point of factory components
- Greaseable outer tie rod ends with zerk fittings for extended service life and easy maintenance
- Inner tie rod boots included to protect the steering rack from trail contamination
- Same operating angle range as factory for full suspension travel compatibility
- Backed by ICON Vehicle Dynamics limited lifetime warranty
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2010-2024 | Toyota | 4Runner |
| 2010-2014 | Toyota | FJ Cruiser |
Specifications
| Detail | Value |
|---|---|
| MPN | ICO55166 |
| Brand | ICON Vehicle Dynamics |
| Inner Tie Rod Material | 4140 Chromoly Steel |
| Outer Tie Rod Material | Forged Steel |
| Ball Joint Type | Metal-on-Metal with Grease Zerk |
| Thread Diameter vs OE | 12% Larger |
| Inner Tie Rod Boots | Included |
| Warranty | Limited Lifetime |
| UPC | N/A |
What's Included
- ICO55166 inner tie rod assemblies (pair)
- Outer tie rod ends (pair)
- Inner tie rod boots
About ICON Vehicle Dynamics
ICON Vehicle Dynamics is a California-based suspension and steering manufacturer focused on producing high-quality off-road components for trucks and SUVs. Known for their coilover shocks, control arms, and steering upgrades, ICON designs each product to perform in demanding conditions while maintaining on-road comfort and reliability. All ICON products are backed by their limited lifetime warranty and made with precision-machined chromoly and forged steel construction for long-term durability.
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Frequently Asked Questions
What is the ICO55166?
The ICO55166 is the ICON Vehicle Dynamics XD Tie Rod Kit for the 2010-2024 Toyota 4Runner and 2010-2014 Toyota FJ Cruiser. It replaces the factory inner and outer tie rods with 4140 chromoly and forged steel components that are 12% larger in thread diameter and use a metal-on-metal ball joint design for off-road durability.
Why should I upgrade my 4Runner or FJ Cruiser tie rods with the ICO55166?
The factory tie rods on the 4Runner and FJ Cruiser are a known weak point when running larger tires or aggressive off-road terrain. The plastic inner races in the OE ball joints are prone to wear and failure under sustained lateral and impact loads. The ICO55166 resolves this with a metal-on-metal design, heavier materials, and 12% more thread surface area for a stronger, more reliable steering connection.
Do I need an alignment after installing the ICO55166?
Yes. Replacing tie rods always requires a four-wheel alignment to set toe angle correctly. The ICO55166 uses the same adjustment design as the factory tie rods, so any alignment shop with standard equipment can perform this service. Plan for a professional alignment immediately after installation.
Will the ICO55166 fit with a lift kit installed?
Yes. The ICO55166 is designed with the same operating angle range as the factory tie rods, which means it is compatible with mild to moderate lift kits. For extreme lift applications, confirm that the tie rod operating angles are within specification for your specific lift height by consulting ICON's technical support.
Are the ICO55166 outer tie rod ends greaseable?
Yes. The outer tie rod ends on the ICO55166 include zerk fittings and are designed for periodic greasing, which extends ball joint service life significantly compared to the sealed factory units. ICON recommends greasing the joints during regular maintenance intervals or after heavy off-road use.
What wheel offsets work with the ICO55166?
The ICO55166 outer tie rod ends are forged to match the OE tie rod profile, making them compatible with factory wheel offsets and most popular aftermarket wheel sizes used on the 4Runner and FJ Cruiser. Extreme negative offset or very wide wheels should be verified for clearance before installation.
Is the ICO55166 a direct bolt-on replacement?
Yes. The ICO55166 is engineered to bolt directly into the factory steering rack and knuckle mounting points without modification. Inner tie rod boots are included to protect the steering rack after installation. Professional installation is recommended for safety, and a wheel alignment is required after any tie rod replacement.
What is the warranty on the ICO55166?
ICON Vehicle Dynamics backs the ICO55166 with a limited lifetime warranty against defects in materials and workmanship. The warranty covers the original purchaser for the life of the product under normal off-road and street use.
Installation Instructions
- Lift and safely support the front of the vehicle on jack stands and remove the front wheels.
- Loosen and remove the outer tie rod end castle nut and separate the tie rod end from the steering knuckle using a tie rod end puller.
- Count and record the number of turns required to remove the outer tie rod end from the adjustment sleeve to maintain approximate toe setting during reassembly.
- Remove the inner tie rod boot clamps and slide the boot off the steering rack.
- Using an inner tie rod removal tool, unscrew the inner tie rod from the steering rack.
- Thread the ICO55166 inner tie rod assembly onto the steering rack and torque to specification. Install the included boot and secure the clamps.
- Thread the outer tie rod end onto the adjustment sleeve using the same number of turns recorded during disassembly.
- Insert the outer tie rod end stud into the steering knuckle and torque the castle nut to specification. Install the cotter pin.
- Repeat for the opposite side.
- Reinstall wheels and torque lug nuts to specification. Grease the zerk fittings on the outer tie rod ends before lowering the vehicle.
- Schedule a professional four-wheel alignment immediately to set toe angle correctly.
WARNING: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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