Brakes and Traction Control: Specifications

Tightening torques for brake mechanics








Technical values











Brake disc diameter, front
Diameter 350 mm

Brake disc diameter, rear
Diameter 350 mm

Effective brake disc diameter,front
Diameter 284 mm

Effective brake disc diameter, rear
Diameter 292 mm

Brake disc thickness, new (front)
Measured value 34 mm

Brake disc thickness, new (rear)
Measured value 28 mm

Minimum brake disc thickness after machining, front
Brake disc can only be reworked symmetrically, i.e. equally from both sides!
Measured value 32.6 mm

Minimum brake disc thickness after machining, rear
Brake disc can only be reworked symmetrically, i.e. equally from both sides!
Measured value 26.6 mm

Brake disc wear limit, front
Measured value 32.0 mm

Brake disc wear limit, rear
Measured value 26.0 mm

Peak-to-valley surface roughness of brake disc after machining (max.)
Measured value 0.006 mm

Thickness tolerance of brake discs (max.)
Measured value 0.02 mm

Lateral runout of brake disc (max.)
Measured value 0.03 mm

Brake disc diameter, front
Diameter 380 mm

Brake disc diameter, rear
Diameter 350 mm

Effective brake disc diameter, front
Diameter 315.8 mm

Effective brake disc diameter,
Diameter 292 mm

Brake disc thickness, new (front)
Measured value 34 mm

Brake disc thickness, new (rear)
Measured value 28 mm

Brake disc wear limit, front
Minimum brake disc thickness (wear limit) is stamped on the brake-disc chamber. Example: Min. Th. 33.7 mm
Measured value mm (Read value on brake disc chamber) X.XX

Brake disc wear limit, rear
Minimum brake disc thickness (wear limit) is stamped on the brake-disc chamber. Example: Min. Th. 27.7 mm
Measured value mm (Read value on brake disc chamber) X.XX

Wear limit: Surface changes in front and rear brake discs
Wear limit: Connected surface fracture ] 1 cm� and/or surface roughness of brake disc ] 80 micrometer. Replace
PCCB brake discs on each axle.
Surface changes Values and procedure for: checking front 46 51 02 PCCB brake discs/checking rear 46 54 02 PCCB brake discs.

Thickness tolerance of brake discs (max.)
Measured value 0.02 mm

Lateral runout of brake disc (max.)
Measured value 0.03 mm

Lateral runout of brake disc when installed (max.)
Measured value 0.06 mm

Technical data - 911 Turbo/GT3/GT3 RS
Brake disc diameter, front 350 mm
Brake disc diameter, rear 350 mm
Effective brake disc diameter, front 284 mm
Effective brake disc diameter, rear 292 mm

Brake disc thickness, new (front)
Measured value 34 mm

Brake disc thickness, new (rear)
Measured value 28 mm

Minimum brake disc thickness after machining, front
Brake disc can only be reworked symmetrically, i.e. equally from both sides!
Measured value 32.6 mm

Minimum brake disc thickness after machining, rear
Brake disc can only be reworked symmetrically, i.e. equally from both sides!
Measured value 26.6 mm

Brake disc wear limit, front
Measured value 32.0 mm

Brake disc wear limit, rear
Measured value 26.0 mm

Peak-to-valley surface roughness of brake disc after machining (max.)
Measured value 0.006 mm

Thickness tolerance of brake discs (max.)
Measured value 0.02 mm

Lateral runout of brake disc (max.)
Measured value 0.03 mm

Lateral runout of brake disc when installed (max.)
Measured value 0.06 mm

911 Turbo/GT3/GT3 RS - PCCB
Brake disc diameter, front 380 mm
Brake disc diameter, rear 350 mm
Effective brake disc diameter, front 315.8 mm
Effective brake disc diameter, rear 292 mm

911 Turbo/GT3/GT3 RS - PCCB brakes (option)
Brake disc thickness, new (front)
Measured value 34 mm

Brake disc thickness, new (rear)
Measured value 28 mm

Brake disc wear limit, front
Minimum brake disc thickness (wear limit) is stamped on the brake disc chamber. Example: Min. Th. 33.7 mm
Measured value mm (Read value on brake disc chamber) X.XX

Brake disc wear limit, rear
Minimum brake disc thickness (wear limit) is stamped on the brake disc chamber. Example: Min. Th. 27.7 mm
Measured value mm (Read value on brake disc chamber) X.XX

Wear limit: Surface changes in front and rear brake discs
Wear limit: Connected surface fracture ] 1 cm� and/or surface roughness of brake disc] 80 micrometer. Replace PCCB brake discs on each axle.
Surface changes Values and procedure for: checking front 46 51 02 PCCB brake discs/checking rear 46 54 02 PCCB brake discs.

Thickness tolerance of brake discs (max.)
Measured value 0.02 mm

Lateral runout of brake disc (max.)
Measured value 0.03 mm

Lateral runout of brake disc when installed (max.)
Measured value 0.06 mm