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Home >> Porsche >> 2021 >> 911 Targa 4 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 54 (46 Brakes - Brake Mechanism 3.0L (Eng Code MDK.KA) -- 992 - 911 CARRERA (992)) >> WM, 4600TW Grey Cast Iron Brakes - Technical Values And Wear Limits >> Grey Cast Iron Brakes - Technical Values And Wear Limits >> Test Values/Wear Limits

Test Values/Wear Limits

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Information 

Depending on the wear of grey cast-iron brake discs, two condition criteria can make replacement necessary:

Location Description Type Basic value Tolerance
Pad thickness, front   Measured value 10.4 mm  
Pad thickness, rear   Measured value 9.5 mm  
Brake disc wear dimension, front   Measured value 32 mm  
Brake disc wear dimension, rear   Measured value 26 mm  
Lateral runout of brake disc, maximum   Measured value 0.03 mm  
Lateral runout of wheel hub, maximum   Measured value 0.03 mm  
Lateral runout of brake disc when installed, maximum   Measured value 0.06 mm