The Crane Axle 30-Spline Aluminum Wheel Hubs are designed for builders who want to maximize performance from their GM 14-bolt rear axle without sacrificing strength or reliability. Machined from premium 6061 billet aluminum, these lightweight hubs significantly reduce rotational mass and unsprung weight compared to traditional cast steel hubs.

By replacing factory hubs with lightweight billet aluminum hubs, builders can:

• Reduce unsprung weight
• Reduce rotational mass
• Improve suspension responsiveness
• Improve acceleration
• Improve braking performance
• Reduce drivetrain stress
• Improve overall vehicle handling

Whether you're building a rock crawler, rock bouncer, Ultra4 car, trail buggy, or high-performance off-road vehicle, every pound removed from rotating components produces a greater performance benefit than removing static vehicle weight elsewhere.

Each hub is precision machined in the USA and built specifically for GM 14-bolt full-float rear axle applications utilizing 30-spline axle shafts.

Includes (Set of 2):

• (2) Crane Axle 6061 Billet Aluminum Wheel Hubs
• Bearing Races Pre-Installed

Sold as a Pair

Specifications

• Application: GM 14-Bolt Full Floating Rear Axle
• Spline Count: 30-Spline
• Material: 6061 Billet Aluminum
• Bearing Races: Included & Pre-Installed
• Finish: Machined Aluminum
• Manufacturing: Precision Machined in USA
• Sold As: Pair

Fitment Fits GM 14-Bolt Full Float Rear Axles commonly found in:

• Compatible with 30-spline GM 14-Bolt upgrade configurations
• Works with standard GM 14-Bolt brake and wheel components unless otherwise modified
• Commonly used in trail buggies, competition off-road vehicles, rock crawler, and custom axle builds
• Verify spline count and carrier compatibility before installation

Tech Insight

Why Does Unsprung Weight Matter?

Unsprung weight includes everything the suspension must control that is not supported by the springs:

• Hubs
• Axles
• Tires
• Wheels
• Brakes

Reducing unsprung weight allows the suspension to react faster to terrain changes, improving traction and ride quality.

Why Is Rotational Weight Important?

Rotating components require energy to accelerate and decelerate. Reducing rotational mass means:

• Faster acceleration
• Reduced braking effort
• Less drivetrain shock
• Improved throttle response

This is why lightweight hubs are commonly found on competitive rock crawlers, Ultra4 cars, and race vehicles.

Why Use a 30-Spline Hub?

30-spline hub configurations have become a proven solution for high-performance 14-bolt applications where strength, serviceability, and reliability are critical.

Are aluminum hubs strong enough for rock crawling?

Yes. These hubs are machined from premium 6061 billet aluminum and are designed for aggressive off-road use including rock crawling, racing, and competition applications.

How much weight do aluminum hubs save?

Weight savings vary by configuration, but aluminum hubs significantly reduce weight compared to factory steel hubs.

Will these fit my factory GM 14-bolt?

They are designed for GM 14-bolt full-float rear axles utilizing 30-spline configurations. Verify your axle setup before ordering.

Why do racers use aluminum hubs?

Reducing rotating and unsprung weight improves suspension performance, acceleration, braking, and overall vehicle responsiveness.

Are bearing races included?

Yes. Bearing races come pre-installed.