RC Body Position Explained
What Is Body Position?
Body Position refers to the placement of the RC car body shell on the chassis – specifically how far forward or backward the body sits relative to the wheelbase, tires and suspension components.
Some RC vehicles use adjustable body posts or mounting holes that allow you to shift the body slightly forward or rearward. While this adjustment may seem minor, Body Position plays a real role in how airflow interacts with the car and how weight is distributed across the chassis.
In simple terms, Body Position changes how the body “covers” the chassis and tires, which directly impacts stability, steering response and high-speed handling.
How Does Body Position Affect Your Car?
Body Position primarily affects aerodynamics, weight balance (slightly), and tire clearance behavior.
1. Steering Response
• Moving the Body Position forward tends to increase steering response.
• More of the body’s mass and aerodynamic influence shifts toward the front tires, helping the car turn in quicker.
2. Stability and Rear Grip
• Moving the Body Position rearward improves stability.
• This places more aerodynamic influence over the rear tires, which can increase rear grip and make the car easier to drive.
3. Aerodynamic Balance
• Forward Body Position = more front downforce feel (more aggressive)
• Rearward Body Position = more rear stability (more forgiving)
This is especially noticeable on Touring cars, On-road pan cars or any high-speed speed-run setups.
4. Tire Clearance and Rubbing
• Incorrect Body Position can cause tires to rub during steering or suspension compression.
• Forward positioning increases the chance of front tire rub.
• Rearward positioning can create rear clearance issues depending on body shape.
How Do You Change Body Position?
Adjusting Body Position is simple and typically done through the body mounting system.
Common Methods:
1. Body Post Adjustment
• Slide adjustable body posts forward or backward (if your chassis allows it).
• Re-align the body and secure with clips.
2. New Mounting Holes
• Drill new holes in the body shell slightly forward or backward.
• This is the most common method for fine-tuning.
3. Body Mount Systems
• Some modern touring cars use floating or adjustable mounts for precise positioning.
Important Tips:
• Always measure both sides to keep the body straight.
• Start with small adjustments (2 – 3mm at a time).
• Re-check tire clearance after every change.
When To Adjust Body Position
Move Body Position Forward When:
• You need more steering or faster turn-in
• The car feels lazy entering corners
• You’re running on tight, technical tracks
• Front grip is lacking
Move Body Position Rearward When:
• The car feels too aggressive or twitchy
• You need more rear stability
• You’re running on high-speed tracks
• Rear grip is inconsistent
General Rule:
• Forward = Aggressive steering
• Rearward = Stability and control
What to Check After Changing Body Position
Changing Body Position can subtly influence other setup areas. After making adjustments, review the following:
1. Ride Height
• Body Position changes how the body sits over the tires.
• Ensure the body isn’t interfering at full compression.
2. Camber
• Tire rub issues may appear after changing Body Position.
• Double-check Camber settings to maintain clearance.
3. Steering Endpoints / Dual Rate
• Forward Body Position can increase steering sensitivity.
• You may need to reduce steering throw slightly.
4. Shock Setup
Increased steering response may require:
• Slightly stiffer front shocks
• Or softer rear shocks for balance
5. Weight Distribution
• While Body Position doesn’t drastically change weight, it can influence handling balance.
• Re-check Battery Position if needed for fine tuning.
6. Body Trim Lines
• Ensure wheel arches are properly centered.
• Mis-alignment can affect both performance and appearance.
FAQ
Q: Does Body Position really make a difference?
A: Yes. While it’s a fine-tuning adjustment, experienced drivers can feel the difference, especially in high-grip or high-speed conditions.
Q: How much should I adjust Body Position at a time?
A: Start with small changes—around 2 – 3mm. Large adjustments can create unintended handling issues.
Q: Is Body Position more important for on-road or off-road?
A: It has a bigger impact on on-road vehicles, where aerodynamics and precision handling matter more.
Q: Can Body Position fix a loose rear end?
A: It can help. Moving the Body Position rearward may improve stability, but it should be combined with other tuning changes for best results.
Q: Will Body Position affect lap times?
A: Yes, especially when fine-tuning for a specific track. Proper Body Position can improve consistency and corner entry speed.
Q: Do all RC cars allow Body Position adjustment?
A: Most do, but the method varies. Touring cars typically offer the most adjustability, while some RTR vehicles may be more limited.
Back to the RC Suspension Tuning Guide.
