Brake System Specifications. Chevrolet Optra

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2009 🢒 Optra - Mexico 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake System Specifications

Application	Specification
Application	Metric	English
Rear Brake Drums
Inside Diameter - New	200 mm	7.87 in
Maximum Rebore Diameter	201 mm	7.91 in
Radial Runout - Not Installed	0.04 mm	0.0016 in
Booster Size
Single	241.3 mm	9.5 in
Dual	177.8 and 203.2 mm	7 and 8 in
Booster Ratio	5.5:1
Caliper
Minimum Piston Diameter - Front	54 mm	2.126 in
Minimum Piston Diameter - Rear	32 mm	1.260 in
Front Brake Rotors
Disc Type	Ventilated
Discard Thickness	22 mm	0.87 in
Lateral Runout - Installed	0.06 mm	0.002 in
Lateral Runout - Not Installed	0.03 mm	0.001 in
Rotor Diameter	256 mm	10.07 in
Rotor Thickness - New	24 mm	0.95 in
Thickness Variation	0.01 mm	0.0004 in
Master Cylinder
Bore Diameter - Nominal	22.22 mm	0.875 in
Bore Diameter - Maximum	22.29 mm	0.878 in
Rear Brake Rotors
Disc Type	Solid
Discard Thickness	8 mm	0.31 in
Lateral Runout - Installed	0.08 mm	0.003 in
Lateral Runout - Not Installed	0.05 mm	0.002 in
Rotor Diameter	258 mm	10.15 in
Rotor Thickness - New	10.4 mm	0.40 in
Thickness Variation	0.01 mm	0.0004 in
Wheel Cylinder Diameter
Maximum	20.7 mm	0.815 in
Nominal	20.64 mm	0.812 in