RC Suspension Tuning Guide – Caster

What is Caster?
Caster is the angle of the steering block kingpin as it leans toward the rear of the car.

Caster is also directly affected by Kickup, something found mostly in 2WD offroad cars. For example, if you have 0° Caster blocks and 2° of Kickup, you really have 2° of Caster (overall). If your car has 4° Caster blocks and 2° of Kickup, actually gives you 6° of Caster.

As a word of caution, ALL Caster blocks ARE directional (except for 0° blocks). If you put the left Caster block on the right, you’ll end up with 2° of positive Caster (the kingpin will lean FORWARD instead of back).

As a rule, most cars use 2, 4 or 6° of Caster as an adjustment.

See also: Kickup, Suspension Mounts

Tuning with Caster
Less Caster
• Quicker steering inputs
• Less stable on the straights and through bumps
• More off-power steering entering corners

More Caster
• Easier to drive
• More stable on the straights and through bumps
• More on-power steering exiting corners

Back to the RC Suspension Tuning Guide.