Caster

What is Caster?

Caster is the angle of the steering block kingpin as it leans toward the rear of the car. There is a bit of misconception here, though. Caster is also directly affected by Kickup. So, if you have 0deg Caster blocks, you really still have 2° of Caster (assuming you have 2° of Kickup, as most cars do). So, using this formula, 4deg Caster blocks actually gives you 6deg of Caster (4 in the blocks and 2 in the Kickup).

More Caster will make your car easier to drive. It will also make it more stable on the straights and through bumpy sections. Less Caster will give the car more steering into corners and make it react quicker to steering inputs. Less Caster will also make your car feel a little more twitchy.

How do you change Caster?

On the TC3, you can change Caster by replacing the front Caster blocks, which ARE directional!!! If you put the left Caster block on the right, you'll end up with 2° of, well, I guess Anti-Caster!!! :)

Other cars change Caster by placing small clips on the upper suspension arm hinge pin (at the bulkhead). Either way, most cars use 0, 2, 4 or 6 degrees of Caster as an adjustment.

Most cars allow you to change Caster by swapping out the front Caster blocks. A quick tip is to get a paint pen (found at any art supply store) to write the degree on the blocks. This will help you keep track when you need to change them.