How do you calculate brake bias?

To calculate brake bias, divide the braking force of one axle by the total braking force of both axles, then multiply by 100. This gives you the bias percentage (e.g., 60% front, 40% rear).

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Handling & Suspension

Brake Bias

Calculate front/rear brake bias percentages.

How to Calculate Brake Bias

FB% = Ff ÷ (Ff + Fr) × 100

Brake bias is the distribution of braking force between front and rear wheels. Proper brake bias optimization prevents lockup, maintains stability, and maximizes braking performance.

Front Braking Force (N):

Rear Braking Force (N):

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About this tool

The BuildLockr brake bias calculator helps mechanics and drivers optimize their vehicle's stopping power. Use this tool to calculate your front and rear braking force distribution percentages. Whether you are installing a proportioning valve or upgrading calipers and rotors, this brake proportioning calculator is essential. This helps tuners achieve a perfectly balanced braking system to prevent lockups and improve trail-braking control.

Typical Brake Bias Ranges

Street Cars: 70/30 to 60/40 (front/rear)
Track Cars: 60/40 to 52/48 (front/rear)
Formula Cars: 55/45 to 50/50 (front/rear)
Oval Track: 52/48 to 48/52 (front/rear)

Higher front bias provides stability under heavy deceleration, while more rear bias improves trail-braking and rotation.

Common Brake Bias Questions

What is brake bias?

Brake bias is the percentage distribution of total braking force between the front and rear axles of a vehicle. It is critical for maintaining stability and maximizing deceleration during heavy braking without locking up the rear tires.

What is a good brake bias ratio?

A good brake bias ratio for most street cars is between 60% to 70% front bias. Track cars often run a slightly more rear-biased setup (like 55% to 60% front) to aid in trail braking and corner entry rotation. It heavily depends on the vehicle's center of gravity and weight transfer under braking.