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View Full Version : Rotor thickness - what's the minimum spec?


SergioK
09-10-2003, 01:30 PM
Anyone know it? Or is it just suffice to say that if there is a lip on the rotor might as well get new ones when swapping in new pads? :dunno: :dunno:

Edit: 2001 X5 3.0

DZeckhausen
10-05-2003, 09:12 AM
Anyone know it? Or is it just suffice to say that if there is a lip on the rotor might as well get new ones when swapping in new pads? :dunno: :dunno:

Edit: 2001 X5 3.0The front rotors on your X5 3.0 started life at 30mm thick. You are allowed 1.6mm of total wear, so the rotors should be replaced when they are 28.4mm thick. The rear rotors started at 12mm thick and should be replaced at 10.4mm.

dzz88
09-13-2005, 10:03 PM
I have a 2002 X5 3.0. They replaced the rotor and pad when I ask them to do the safty inspection required for ownership transfer. My car has only 40000 KM (not miles). What is the rough life for the rotors

dzz88
09-13-2005, 10:07 PM
I have a 2002 X5 3.0. They replaced the rotor and pad when I ask them to do the safty inspection required for ownership transfer. My car has only 40000 KM (not miles). I know it depends on the driving pattern but what is the rough life for the rotors

The front rotors on your X5 3.0 started life at 30mm thick. You are allowed 1.6mm of total wear, so the rotors should be replaced when they are 28.4mm thick. The rear rotors started at 12mm thick and should be replaced at 10.4mm.
:p :p

DZeckhausen
09-14-2005, 04:56 AM
I have a 2002 X5 3.0. They replaced the rotor and pad when I ask them to do the safty inspection required for ownership transfer. My car has only 40000 KM (not miles). I know it depends on the driving pattern but what is the rough life for the rotorsThat's an unanswerable question for the exact reason you just mentioned. It depends on the driving patterns. I have a customer in San Francisco who lives and works in the city and goes through a set of street pads on his 740iL every 10,000 miles. I just shipped a set of pads to someone with the exact same car in Montana who went 70,000 miles before his first pad change. It depends on the length and type of commute, the topography, and the age/maturity level of the driver.

There is no "normal" life for rotors. There's only your normal life. You can take a poll on the forum and get a range of values. But it may be meaninless if your driving patterns are not represented among the respondants.