In our previous guide, we explored whether RC racers sand their tyres smooth and when it can actually improve traction.

But sanding tyres isn’t a one-size-fits-all technique.

In fact, on-road and off-road RC tyres are sanded for completely different reasons. The tyres themselves are different, the track surfaces are different, and the performance goals are different too.

In this follow-up guide, we’ll explain:

• How off-road racers sand tyres

• Why on-road racers regularly true their tyres

• The tools used in both setups

• The key differences between the two approaches

Understanding these techniques can help you get better grip, more consistent handling, and longer tyre life from your RC car.

Sanding Off-Road RC Tyres

Off-road tyre sanding usually involves modifying the tread pattern, not changing the tyre diameter.

On high-grip clay tracks, aggressive tread patterns such as thread tyres can sometimes generate too much bite. This can make the car feel edgy or inconsistent through corners.

Some racers solve this by sanding the threads down to create a smoother tyre surface.

This technique:

• Reduces aggressive tread

• Creates a more consistent contact patch

• Replicates the behaviour of slick tyres

• Helps worn tyres last longer during practice

Before modern clay tyres became common, racers often bought thread tyres and sanded them down to create homemade slicks.

Today, many manufacturers offer tyres designed specifically for clay racing. Brands commonly used include:

• Pro-Line Racing

• JConcepts

• AKA Racing

• Sweep Racing

These RC tyres are designed with the correct compound and tread profile for clay tracks, reducing the need to modify them.

Sanding On-Road RC Tyres

On-road tyre sanding is very different.

Instead of changing tread patterns, racers sand tyres to remove centre bead when new and remove graining after running. By removing tyre graining you are giving a fresh surface and maximum contact patch.

On-road racers often true tyres to:

• Remove centre bead created from the moulding process

• Remove any contaminates from the curing process

• Restore contact patch by removing graining, after every run.

• Maintain consistent lap time.
  

Key Differences Between On-Road and Off-Road Tyre Sanding

In simple terms:

• Off-road sanding changes the tread

• On-road sanding restores contact patch

Tools Used for RC Tyre Sanding

The most common tool used for tyre sanding is a tyre sander.

A tyre sander spins the tyre while sanding it evenly, allowing racers to precisely control tyre speed to get the surface result they require

Benefits of using a tyre sander include:

• Checking buckled wheel

• Prepping tyre from new

• Improve contact patch

• Increased on track performance

Serious racers almost always rely on tyre sanders for maximum performance.

Watch: RC Tyre Setup Tips from Hearns Hobbies

RC Tyre Compounds Guide – Grip, Speed & Control | Hearns Hobbies

Hearns Hobbies explains that tyre compound and surface matching are critical for performance, often making a bigger difference than motor upgrades or suspension tuning.

Understanding the relationship between tyre compound, surface, and preparation can dramatically improve lap times and overall driving control.