Roll Center

In brief, roll center is a way to measure how eager the car is to lean into turns.  If you lower the car’s roll center, its chassis will roll side-to-side more, and that transfer of weight to the outside wheels creates extra grip on that side. 

Lower front roll center

• More chassis roll in turns
• More side grip
• More on-power steering
• Generally suited for low-grip tracks

Higher front roll center

• Less chassis roll in turns
• Less side grip
• Less on-power steering
• Reduces traction roll
• Generally suited for high-grip tracks
  

Lower rear roll center

• More chassis roll in turns
• More side grip
• More on-power traction
• Less traction under braking
• Generally suited for low-grip tracks

Higher rear roll center

• Less chassis roll in turns
• Less side grip
• Less on-power steering
• Reduces traction roll
• Generally suited for high-grip tracks
  

Changes to the lower suspension arm typically have a larger impact than changes to the camber link.

The roll center is affected by many different changes to the suspension, including camber link length, camber link ball stud locations, arm length, pin height, axle height, and others.