RC Tire Compound Explained
What Is Tire Compound?
Tire Compound refers to the type of rubber or foam material used in your RC tires. It determines how soft or hard the tire is, and that directly affects how the tire interacts with the track surface.
In simple terms:
• Soft Tire Compound = more grip, faster wear
• Hard Tire Compound = less grip, longer life
Manufacturers create different Tire Compounds by changing the rubber mix. You’ll often see them labeled as:
• Soft / Super Soft
• Medium
• Hard
• Clay, Carpet or Outdoor-specific blends
Foam tires (common in on-road racing) also use different Tire Compounds (aka Shore Rating), but instead of rubber blends, they vary density and treatment.
Tire Compound is one of the most important tuning tools you have because it controls how your car connects to the surface.
How Does Tire Compound Affect Your Car?
Tire Compound has a direct impact on grip, handling balance and consistency.
1. Overall Grip Level
• Softer Tire Compound increases traction
• Harder Tire Compound reduces traction
More grip can improve lap times, but too much can make the car feel stuck or edgy.
2. Steering Response
• Softer front Tire Compound = more aggressive steering
• Harder front Tire Compound = smoother, less responsive steering
If your car feels lazy on turn-in, a softer front Tire Compound can wake it up.
3. Rear Stability
• Softer rear Tire Compound = more rear grip and stability
• Harder rear Tire Compound = easier rotation, but less traction
If your car is spinning out on throttle, your rear Tire Compound may be too hard.
4. Tire Wear and Consistency
• Soft Tire Compound wears faster and can change during a run
• Hard Tire Compound lasts longer and stays more consistent
On long mains, consistency can be more valuable than peak grip.
5. Track Temperature Sensitivity
• Softer Tire Compounds work better in cooler conditions
• Harder Tire Compounds perform better in hot conditions
Track temperature can completely change how a Tire Compound behaves.
How Do You Change Tire Compound?
Changing Tire Compound is simple – you swap tires, but doing it correctly requires attention to detail.
1. Select the Right Tires
Choose a Tire Compound based on:
• Track surface (clay, carpet, asphalt, dirt)
• Grip level
• Temperature
Most racers bring multiple Tire Compounds to the track.
2. Mount and Prep Tires
Make sure:
• Tires are properly glued to the wheels (even pre-mounts should be checked prior to using)
• Inserts match the Tire Compound (soft inserts with soft tires, etc.)
• Tires are clean before use
3. Match Front and Rear Balance
You don’t always need the same Tire Compound front and rear.
Common setups:
• Softer front / harder rear = more steering
• Harder front / softer rear = more stability
4. Break-In (If Needed)
Some Tire Compounds improve after a short run. Don’t judge them on the first lap.
When To Change Tire Compound
Knowing when to adjust Tire Compound is what separates casual driving from consistent performance.
1. Changing Track Conditions
• Track getting slick – go softer
• Track gaining grip – go harder
2. Temperature Changes
• Cold morning – softer Tire Compound
• Hot afternoon – harder Tire Compound
3. Handling Issues
• Car pushing (understeer) – softer front Tire Compound
• Car loose (oversteer) – softer rear Tire Compound
4. Tire Wear Problems
• Tires wearing too fast – go harder
• Tires glazing or not gripping – go softer
5. Race Length
• Short runs – softer Tire Compound for max grip
• Long mains – harder Tire Compound for consistency
What to Check After Changing Tire Compound
After switching Tire Compound, your car’s behavior will change. Always check these areas:
1. Balance (Front-vs-Rear Grip)
Make sure the car isn’t:
• Pushing too much
• Spinning out on throttle
2. Tire Temperature
Feel the tires after a run:
• Too hot – Tire Compound may be too soft
• Too cool – Tire Compound may be too hard
3. Tire Wear Pattern
Look for:
• Even wear across the tire
• Excessive edge wear (could indicate setup issues)
4. Suspension Setup
More grip from a softer Tire Compound can require:
• Slightly stiffer springs
• Thicker shock oil
• Adjustments to Camber or Roll Center
5. Ride Height
Softer Tire Compounds can squat more under load, which may lower Ride Height. Re-check it after a run.
FAQ
Q: What is the best Tire Compound for beginners?
A: Start with a medium Tire Compound. It offers a good balance of grip, durability and consistency. You can also check with your local drivers to see what compounds they are using.
Q: Should I always run the softest Tire Compound available?
A: No. While a soft Tire Compound provides more grip, it can wear quickly and make the car harder to drive. Balance is key.
Q: Can I mix Tire Compounds front and rear?
A: Yes, but it’s not common. Mixing Tire Compounds can fine-tune steering and stability but may also make it easier to upset the balance of your car.
Q: How long do Tire Compounds last?
A: It depends on the surface and driving style. Softer Tire Compounds may last only a few runs, while harder ones can last multiple race days.
Q: Does Tire Compound matter on all surfaces?
A: Absolutely. Tire Compound is critical on carpet, clay, asphalt and dirt. Each surface responds differently.
Q: Do I need different Tire Compounds for indoor0vs-outdoor tracks?
A: Yes. Indoor tracks often require softer Tire Compounds, while outdoor tracks may need harder ones depending on temperature and surface.
Back to the RC Suspension Tuning Guide.
