How to Replace and Upgrade Your RC Car's Front Upper Arm

The front upper arm is a critical part of your RC car's suspension. It connects the chassis to the wheel hub, allowing the suspension to move up and down while keeping the wheel aligned. Over time, this part can wear out or break, especially if you drive on rough terrain or crash often. Replacing it is a straightforward task that you can do at home with basic tools.

In this guide, we'll walk you through the process of replacing and upgrading your RC car's front upper arm. We'll cover the tools you need, how to identify the right part, and step-by-step instructions for removal and installation. We'll also discuss when it's worth upgrading to a stronger or adjustable arm, and recommend some quality parts to consider.

Tools and Parts You'll Need

Before you start, gather the necessary tools and parts. You'll typically need a set of hex drivers (metric sizes), a small screwdriver, needle-nose pliers, and possibly a wrench for lock nuts. Having a clean workspace and a tray to keep small parts organized will save you frustration.

You'll also need the correct replacement arm. Check your RC car's manual or measure the old arm to ensure you get the right size and shape. For example, the RCG Racing 10-Series 1/10 Rear Upper Suspension Arm Set is designed for 1/10 scale cars, but you can also find arms for smaller scales like 1/16 or 1/24.

• Hex drivers (metric)
• Small screwdriver
• Needle-nose pliers
• Wrench for lock nuts
• Replacement upper arm (e.g., RCG Racing 10-Series 1/10 Rear Upper Suspension Arm Set)

How to Identify the Correct Replacement Arm

Not all front upper arms are the same. They vary in length, thickness, and mounting style. To find the right one, refer to your RC car's manual or look up the part number online. You can also measure the old arm from center to center of the mounting holes. If you're unsure, contact the manufacturer or a knowledgeable retailer.

For popular models like the RCG Racing Tracer or MT-One, you can find specific arms such as the RCG Racing Tracer / MT-One Body Posts, which are used for mounting the body but not the suspension. For the suspension itself, you might need to look for arms that match your chassis. Always double-check compatibility before purchasing.

• Check the manual for part numbers
• Measure the old arm's length and hole spacing
• Confirm compatibility with your chassis

Step-by-Step Replacement Process

Start by removing the wheel and tire on the side you're working on. This gives you access to the suspension components. Use a hex driver to remove the wheel nut and pull the wheel off. You may also need to remove the body shell to reach the upper arm mounting points.

Next, disconnect the upper arm from the chassis and the steering knuckle. Use pliers to remove any clips or pins that hold the arm in place. Be careful not to lose small parts. Once the old arm is free, compare it with the new one to ensure they match. Then, install the new arm by reversing the removal steps, making sure all fasteners are tightened securely.

• Remove the wheel and body shell for access
• Disconnect the arm from chassis and knuckle
• Install the new arm and tighten all fasteners

When to Consider an Upgrade

Stock upper arms are often made of plastic, which is lightweight but can flex or break under stress. If you're a competitive racer or drive aggressively, upgrading to a stronger material like aluminum or carbon fiber can improve durability and handling. Adjustable arms are also available, allowing you to fine-tune camber and caster for better performance.

For example, the RCG Racing Tracer / MT-One Metal Front CAD Shafts & Pins & Lock Nut M4 (Upgrade) is a metal upgrade kit that includes shafts and pins, but for the arm itself, you might look for a dedicated upper arm upgrade. Always ensure the upgrade is compatible with your car's suspension geometry.

• Plastic arms are lightweight but can break
• Metal or carbon fiber arms offer more strength
• Adjustable arms let you tune suspension settings

Replacing your RC car's front upper arm is a manageable DIY task that can restore performance and prolong the life of your vehicle. By following this guide, you'll be able to identify, replace, and even upgrade this essential component. For quality parts and expert advice, check out the selection at RC Geeks® to find the right fit for your model.