Trail-Gear Chromoly Spindle Nut Kit – Toyota Front Axle Hub Service Upgrade (300519-KIT)

Stronger than stock and built for repeated axle servicing. The Trail-Gear Chromoly Spindle Nut Kit is a heavy-duty replacement for factory spindle nuts and lock washers, designed to improve wheel bearing security and simplify maintenance on off-road Toyota front axle hubs.

On vehicles that see regular off-road use, wheel bearings often require more frequent inspection and servicing. Factory spindle nuts and OEM lock washers can wear out over time, especially after repeated removal. This chromoly upgrade provides a stronger, more durable solution that helps protect wheel bearing adjustment and reduce long-term service costs.

Why Upgrade from OEM Spindle Nuts?

• Stronger than stock factory spindle nuts
• Designed for repeated servicing and maintenance
• Helps prevent issues caused by loose spindle nuts and worn OEM lock washers
• Can help extend wheel bearing life by maintaining proper hub retention
• Improves long-term reliability on off-road vehicles

Construction & Engineering

• CNC machined from 4130 chromoly steel
• Locking nut heat-treated to Grade 8 standards
• Designed for easy installation and secure locking
• Heavy-duty hardware for off-road and service use

What’s Included

• 2 × Thrust Washers
• 2 × Spindle Locking Nuts
• 2 × Spindle Locking Washers
• 4 × M3 Locking Washers
• 4 × M3-0.5 Socket Head Cap Screws

This kit includes the hardware required for one axle.

Vehicle Compatibility

• Toyota Pickup – 1979–1995
• Toyota 4Runner – 1985–1995
• Toyota T100 – 1993–1998
• Toyota Land Cruiser 70 Series – 1984–2007
• Toyota Land Cruiser 80 Series – 1990–1997
• Toyota Land Cruiser 100 Series – 1998–2007

Ideal For

• Vehicles with solid front axle hubs
• Off-road builds requiring regular hub servicing
• Wheel bearing maintenance and front hub rebuilds
• Owners wanting a stronger alternative to OEM spindle nuts

Installation Notes

• Designed for straightforward installation
• Professional installation recommended if you are unfamiliar with wheel bearing preload setup
• Always inspect bearings, hub components and threads during assembly

Warranty

• 12-month limited warranty
• Applies to the original purchaser only
• Covers defects in materials or workmanship under normal use
• Does not cover labour, removal/reinstallation, or consequential costs

FAQs

1) What does this kit replace?
It replaces the factory spindle nuts, lock washers and related hardware on one axle.

2) Why is chromoly better than OEM?
4130 chromoly offers higher strength and better durability, especially on vehicles that are serviced frequently.

3) How many hubs does this kit cover?
This kit covers one axle.

4) Will this help wheel bearing life?
Yes. A stronger, more secure spindle nut system can help maintain proper adjustment and reduce issues caused by loose OEM hardware.

5) Is it difficult to install?
Installation is straightforward, but correct wheel bearing adjustment is essential.

6) Is this only for off-road vehicles?
No, but it is especially useful on vehicles that see frequent maintenance or hard use.