Rear rotor mystery
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MBWorld Fanatic!
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From: WI
17 E43; 21 GLS580
MBWorld Fanatic!
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From: Canada
A car
Thread Starter
MBWorld Fanatic!
Joined: Oct 2014
Posts: 4,524
Likes: 1,181
From: WI
17 E43; 21 GLS580
Essentially... Rear rotor under normal use last way more than 100k miles Even front rotors can last 100k. Pads of course last a lot less. Aside from corrosion most rear rotors last the life of the car. 70% of the braking is done by the front. I guess if you drive mostly in reverse you could wear them out quicker
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Thread Starter
MBWorld Fanatic!
Joined: Oct 2014
Posts: 4,524
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From: WI
17 E43; 21 GLS580
Not a bad idea, however 3 pad swaps is no less than 150k for the front brakes! Ive only replaced front rotors in one car an Acura RL. Again rotors can "warp", glaze or corrode before then, all issues that be fixed by resurfacing, but wearing out is rare indeed. Some shops prefer to replace than resurface since its quick and easy but it has nothing to do with wear. If you endurance race your car that is another story.
MBWorld Fanatic!
Joined: Jun 2011
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From: Canada
A car
MB dealers will tell you to swap out the rear rotors after replacing the front pads/rotors twice or whatever. They don't want you to resurface so they can make more money on the rotors.
Anyway, my point was that it's wrong to say that rear rotors NEVER need changing. They are a wear item and I have replaced them in my past vehicles for various reasons (wear, weird vibrations coming from the rotors (suspected) etc.
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I get about 25-30k miles on a set of front pads. I'm in a hot climate with very aggressive, congested traffic of 50-65 mph with 1-2 second vehicle spacing. Interstate speeds are higher. Good brakes are essential.
