blog about Guide to Selecting Trailer Jockey Wheels Size and Load Tips

Imagine a heavily loaded trailer slowly sliding down a slope—without reliable stabilizer wheels, the consequences could be disastrous. Stabilizer wheels, also known as support wheels or jockey wheels, are critical components for safely parking and conveniently moving trailers and RVs. Selecting the right stabilizer wheel is not just about convenience; it directly impacts safety. This article delves into the key parameters of stabilizer wheels from a data-driven perspective to help you make an informed decision.

When replacing or installing stabilizer wheels, it’s essential to evaluate the following seven key factors to ensure the chosen model matches your needs:

1. Axle Diameter: The diameter of the stabilizer wheel axle must match the mounting bracket (typically a clamp) on your trailer or RV. Common axle diameters include 34mm, 42mm, 48mm, and 60mm. Choosing the wrong size will render installation impossible.
2. Load Capacity: The stabilizer wheel’s load capacity must meet or exceed the total weight of your trailer or RV. Overloading can damage the wheel and pose safety risks.
3. Closed Height: This refers to the total height of the stabilizer wheel when fully retracted (excluding the wheel itself). It determines whether the wheel will interfere with other trailer components when stowed.
4. Extended Height: This measures the total height when the stabilizer wheel is fully extended (excluding the wheel). It ensures the wheel provides adequate support on uneven ground.
5. Wheel Size: Larger wheels roll more easily on rough terrain, while smaller wheels are better suited for flat surfaces.
6. Axle Type: Stabilizer wheel axles come in smooth or serrated variants. Smooth axles are ideal for lighter applications, while serrated axles offer better grip for heavier loads.
7. Extension Mechanism: Manual fixed-height wheels require manual adjustment and locking, while automatic retractable wheels adjust automatically for greater convenience.

Stabilizer wheels are categorized into four main types by axle diameter, each suited for specific scenarios:

These are typically used for lightweight trailers such as camping trailers, motorcycle trailers, boat trailers, and small sailboat trailers. They are lightweight, feature smaller wheels, and have relatively lower load capacities.

Best for: Trailers under 500kg, those requiring frequent movement, or where weight and space are critical considerations.

This widely used size offers various wheel dimensions and load capacities. Older carriage trailers, utility trailers, cargo trailers, and flatbed trailers often use this size. Installation is flexible, either directly via clamps or welded brackets.

Best for: Medium-weight trailers (500kg–1500kg) where load capacity and installation flexibility are priorities.

The most popular size today, nearly all new trailers and RVs come equipped with 48mm stabilizer wheels. They vary in height, load capacity, and style, with multiple wheel sizes available. RVs typically use short, smooth axles, while heavy-duty trailers feature long, serrated axles.

Best for: All trailer and RV types, especially those requiring adjustable height or diverse styling.

Designed for trailers weighing up to 3500kg, these wheels are less common and have limited variations. They are installed via heavy-duty clamps or welded brackets.

Best for: Ultra-heavy trailers over 2000kg, where stability and safety are paramount.

Always ensure the stabilizer wheel’s load capacity exceeds your trailer’s weight. For example:

• A 500kg camping trailer typically requires a 150kg-capacity stabilizer wheel.
• A 3500kg car hauler needs a 300kg-capacity serrated axle wheel.

Closed height prevents interference with trailer components when stowed, while extended height ensures proper support on uneven ground. Single-axle RVs need shorter extensions, whereas multi-axle trailers require longer ranges.

Larger, wider wheels handle rough terrain better. When replacing damaged wheels, always match the original size.

Smooth axles suffice for light loads, while serrated axles provide superior grip for heavy-duty applications.

Manual wheels are common and cost-effective, while automatic wheels offer convenience, especially for trailers with minimal ground clearance.

Selecting the right stabilizer wheel involves balancing axle diameter, load capacity, height, wheel size, axle type, and extension mechanism. Prioritize safety and match the wheel to your trailer’s specific needs for optimal performance and reliability.