Brake Bias Calculator
SI
Imp
Imperial
Inputs
View results
Front line pressure
(P_f)
Hydraulic pressure at the front calipers.
psi
Rear line pressure
(P_r)
Hydraulic pressure at the rear calipers after any proportioning valve.
psi
Front piston diameter
(d_f)
Diameter of one piston on one side of the front caliper.
in
Front pistons per side
(n_f)
Number of pistons on one side of one front caliper.
Rear piston diameter
(d_r)
Diameter of one piston on one side of the rear caliper.
in
Rear pistons per side
(n_r)
Number of pistons on one side of one rear caliper.
Front pad friction
(mu_f)
Effective pad coefficient of friction.
Rear pad friction
(mu_r)
Effective rear pad coefficient of friction.
Front effective radius
(R_f)
Effective rotor friction radius at the front.
in
Rear effective radius
(R_r)
Effective rotor friction radius at the rear.
in
Front tire radius
(r_f)
Rolling radius used to convert torque into tire contact force.
in
Rear tire radius
(r_r)
Rear rolling tire radius.
in
Results
Default result
Edit inputs
Front brake bias
83.6
%
Caution
Also computed
Front axle brake force
2,341
lbf
2,341 lbf
Rear axle brake force
459.7
lbf
459.7 lbf
Front wheel torque
1,267
lbf·ft
Rear wheel torque
248.9
lbf·ft
Method notes
2 notes
Bias is based on calculated axle tire-contact brake force, assuming the same hardware on left and right sides.
Real brake balance also depends on weight transfer, tire grip, tire diameter, pad temperature, ABS/EBD, proportioning valve curves and suspension geometry.
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