Tuff Country 57850 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Tuff Country
57850
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Tuff Country 57850 Rear Ubolt Kit for Use with Blocks - 3" To 4"
Product Details
Description
Upgrade your lifted Toyota with a rugged, corrosion-resistant rear u-bolt kit designed to keep your axle secure on 3"–4" blocks. The Tuff Country 57850 Rear Axle U-Bolt Kit provides a straightforward replacement for factory u-bolts on 4WD Toyota trucks and Tacomas.
- Kit contents: 4 zinc-plated rear u-bolts with nuts and washers included—ready for a complete install.
- Material & finish: Zinc-plated steel for superior corrosion resistance in exposed under-vehicle environments.
- Bend type: Square-bend design offers consistent contact with blocks for reliable clamping.
- Dimensions: 9/16" bolt diameter; 2-1/2" inside diameter; 10-5/8" overall length.
- Design purpose: Specifically engineered for lifted suspensions using rear blocks (3"–4"), maintaining proper axle positioning.
- Vehicle compatibility: Suitable for 1986–1995 Toyota Truck 4WD with 2.5" rear axle; 1995–2004 Toyota Tacoma 4WD; 1999–2006 Toyota Tundra 4WD.
Replacing the factory u-bolts with the Tuff Country 57850 kit helps ensure dependable axle clamp under load, reduces risk of slippage on rough terrain, and supports long-term durability in off-road and daily-driving scenarios. The included nuts and washers simplify installation and help maintain a secure, factory-like fit after lifting and adding blocks. This upgrade is ideal for enthusiasts who regularly tow, haul, or explore backcountry trails and need reliable rear suspension hardware that stands up to the elements.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1995–2004 | Toyota | Tacoma | 4WD | |
| 1986–1995 | Toyota | Truck | 4WD | with 2.5" Rear Axle |
| 1999–2006 | Toyota | Tundra | 4WD |
Specifications:
FAQs
Please read our FAQs page to find out more.
Will this part fit my vehicle?
Fitment varies by year, make, model, drivetrain, and lift height. Always use the vehicle fitment selector or refer to the fitment notes on the product page before purchasing. If you’re unsure, our team can help confirm compatibility.
Are Tuff Country products street legal?
Most Tuff Country products are designed for on-road and off-road use, but local laws and regulations vary by state and country. It is the customer’s responsibility to ensure compliance with local vehicle regulations after installation.
Is professional installation required?
Professional installation is recommended but not required. Many products can be installed by experienced DIYers with proper tools. However, improper installation can affect ride quality, safety, and warranty coverage.
Will this affect my ride quality?
Tuff Country products are engineered to balance ride comfort, performance, and durability. Ride quality can change depending on lift height, vehicle setup, tire size, and other suspension components.
Are Tuff Country products covered by a warranty?
Yes. Tuff Country products are backed by a manufacturer warranty that covers defects in materials and workmanship. Warranty terms vary by product type and do not cover damage caused by misuse, improper installation, or normal wear.
Can I run larger tires with this product?
Many Tuff Country lift kits and suspension components allow for larger tire sizes, but maximum tire clearance depends on wheel offset, tire width, and vehicle configuration. Refer to the product details or contact support for guidance.
What is the return policy?
Unused, uninstalled products may be eligible for return within the stated return window. Items must be in new condition and returned in original packaging. Shipping costs and restocking fees may apply.
Who can I contact if I have questions?
Our customer support team is available to help with fitment questions, installation guidance, and order support. Reach out before purchasing if you want to ensure you’re selecting the right part for your build.
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If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Selling Suspension Systems for 35+ Years
Tuff Country EZ-Ride Suspension was incorporated over 35 years ago, realizing the desperate need for quality suspension products in the after market world.