Enter your vehicle's Front/Rear Weight, Wheelbase, CG Height, and braking specs — including Max Braking Force, Tire Diameters, and Caliper Piston Area — and the Brake Force Distribution Calculator gives you your Brake Bias Ratio, Dynamic Weight Transfer, and Front/Rear Distribution.
Brake Bias Ratio
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Total Vehicle Weight
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Static Front Weight
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Dynamic Front Weight
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Front Brake Force
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Rear Brake Force
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Weight Transfer
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Brake bias is the distribution of braking force between front and rear wheels, expressed as a percentage. Proper brake bias prevents wheel lockup, maximizes braking efficiency, and maintains vehicle stability during hard braking.
During braking, weight transfers from rear to front wheels due to deceleration forces. This increases the load on front tires and reduces rear tire grip, requiring more front brake force and less rear brake force for optimal performance.
Incorrect brake bias can cause premature wheel lockup, reduced braking performance, and vehicle instability. Too much rear bias causes rear wheel lockup and potential spin, while excessive front bias reduces overall braking effectiveness.
Larger caliper piston areas generate more clamping force for the same hydraulic pressure. Larger rotor diameters provide greater leverage and heat dissipation. The combination determines the actual braking torque at each wheel.
Most passenger vehicles have brake bias between 60-70% front during hard braking. Race cars may run 70-80% front bias depending on weight distribution, aerodynamics, and track conditions.
A higher center of gravity increases weight transfer during braking, requiring more front brake bias. Lower vehicles have less weight transfer and can run more balanced brake bias ratios.
Brake bias can be adjusted by changing caliper piston sizes, rotor diameters, brake pad compounds, or using adjustable proportioning valves. Race cars often use brake balance bars for real-time adjustment.