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      11-14-2014, 04:06 AM   #1
ManiacGT
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Mileage when discs(rotors)/brakes were replaced?

Guys, what mileage did you replace your brakes and discs (rotors)? My car is just on 30K miles now and I'm a fairly average speed driver (mostly short runs with a one day a week mad driving spurt).

While the car says 11K miles until rears and 25K miles until front replacement, I've started to notice some drone under heavy braking and some judder from the brakes generally (moderate braking to a stop makes you nod just a bit).

I'm guessing its the lots of commute stop starts and the odd emergency braking due to idiots that's done it, but I wondered when others were replacing theirs?

I'm considering Brembo discs and pads next.
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      11-14-2014, 08:16 AM   #2
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Car has 36,000 miles and I just replaced the rear rotors and pads. The fronts will be done early next year. I am a short distance commuter, lots of braking.
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      11-14-2014, 11:18 AM   #3
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Approx 87,000kms/54,400miles, rear only. I think that I use my brakes less than the avg driver.
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      11-14-2014, 12:17 PM   #4
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at 47.000kms I did all four rotors incl. pads and sensors.... mostly preventive swap, gotta admit... the new look better, no rust, no braking -dirt
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      11-24-2014, 09:18 AM   #5
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65000 miles just did front rotors and pads
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      11-24-2014, 10:05 AM   #6
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So I'm seeing the same thing here I see on most forums. Owners replacing rotors rather than resurfacing them. In the Miata world (where I came from before landing here) the rationale was always that it's about a wash, cost-wise, to replace rather than resurface (which is not true at all in my experience). Knowing the cost of German parts, I can't believe that's the same rationale going on here. Please enlighten!
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      11-24-2014, 10:19 AM   #7
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OP, that sounds about right.

I'm on track for replacement at around 27k miles also.

Personally, I would stick with the OEM pads. I've used brembo "sport" pads in the past and was not impressed. I took them from full depth to half depth in 1 track day
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      12-01-2014, 01:10 AM   #8
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Quote:
Originally Posted by paris1 View Post
So I'm seeing the same thing here I see on most forums. Owners replacing rotors rather than resurfacing them. In the Miata world (where I came from before landing here) the rationale was always that it's about a wash, cost-wise, to replace rather than resurface (which is not true at all in my experience). Knowing the cost of German parts, I can't believe that's the same rationale going on here. Please enlighten!
The minimum rotor thickness is likely to be exceeded before your replacement set of pads require replacement. I'm guessing these numbers from my rear rotor replacement experience...but something like 1.8mm is allowable wear on rotors, and my wear was at 1.1mm.
So instead of resurfacing/reusing the remaining 0.7mm I got new rotors. Rear brakes tend to wear out faster as they do double duty as our lsd. Driving style/habits are a factor.

****found my post**** http://e89.zpost.com/forums/showthread.php?t=846240
I finished my install this morning with driverside rotor and pads. I measured the remaining thickness on old rotpr to be 0.742 inch. New is 0.785 (20mm).
The minimum allowed is 0.721 (18.4 mm). I only had half of a mm to go. It was time for rotors.
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Last edited by z4z4z4; 12-01-2014 at 01:24 AM..
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      12-01-2014, 07:00 AM   #9
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Z4Z4Z4 you may have had only 1/2 mm to go before you hit the minimum, but that represents only 66% rotor wear. Seems like you had some significant time left on those rotors.
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      12-01-2014, 09:36 AM   #10
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Quote:
Originally Posted by jparnes1 View Post
Z4Z4Z4 you may have had only 1/2 mm to go before you hit the minimum, but that represents only 66% rotor wear. Seems like you had some significant time left on those rotors.
The problem is, if he were to turn them he would lose that remaining 1/2mm. Hard to imagine that kind of wear. On most Japanese cars, for example, you can turn rotors two or three times and still be within spec.
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      12-01-2014, 11:09 PM   #11
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Quote:
Originally Posted by jparnes1 View Post
Z4Z4Z4 you may have had only 1/2 mm to go before you hit the minimum, but that represents only 66% rotor wear. Seems like you had some significant time left on those rotors.
true.
if my rotors had >=50% remaining I could reuse them with good conscious... with only 34% remaining I would be out of spec before new pads ended.
I used it as a good excuse to upgrade visual sport look with drilled/slotted units.
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