How can understeer and oversteer be tuned through chassis setup?

Understeer can be reduced by: softening front springs/anti-roll bar, stiffening rear, increasing front tire grip, or moving weight rearward. Oversteer can be reduced by opposite changes: stiffening front, softening rear, or reducing rear tire grip. Suspension geometry (roll center height, toe settings), differential type, and weight distribution also affect balance. Engineers target slight understeer for safety as it's more predictable for average drivers.