Brake bias
The share of total braking force sent to the front axle. More forward bias tends to make the car stable under braking but pushes the front tires toward lockup and adds entry understeer; more rearward bias helps the car rotate into the corner but brings the rear closer to locking, which is far harder to catch. The optimum moves with fuel load, tire wear and grip conditions, so treat it as a live tuning tool rather than a set-and-forget value.
Effect by corner phase
The primary lever for braking stability versus rotation: forward is calm and long, rearward is pointy and riskier.
Symptom tendencies
These describe tendencies, not rules.
Front lockups at the end of hard braking zones Entry
Moving bias rearward in small steps tends to release the fronts — stop as soon as the rear starts feeling light.
Entry understeer — the car will not rotate into slow corners under trail braking Entry
A small rearward bias step tends to bring the nose in; combine with your braking-release shape before chasing setup elsewhere.
Verify on track before you commit to a change.