Boxster Brake Rotors Mileage Life??? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

jrdiesel01 · 06-12-2008, 09:31 AM

Has anybody had experience with Brake rotors such as OEM or Aftermarket replacements, turning rotors, or life expectancy?

My rotors (1998 w/60Kmiles) have a dime thick outer edge developing on the outer portion of the disc where the pad doesn't make contact. The surface is generally smooth.

How long have you had your rotors? Mileage, etc.??
Mileage on your rotor life please.

I'll start: 1998 w/60K Miles.

Thanks.

Lil bastard · 06-12-2008, 09:55 AM

How long your rotors last will depend on a few things; how often and hard are you on the brakes (an expressway only car will go a lot more miles than an urban stop & go car will), what type pads are you using?, etc.

To check, you need a micrometer. Rotor Wear Limit is 22.6mm (Fr) and 18.6mm (Rr). The Rotor Machining Limit is 22.0mm (Fr) and 18mm (Rr).

If you have a ridge built-up on the rotor, this can be machined off and the pad roughed up (smooth isn't better) - usually about $15/rotor

You should also check for rotor lateral runout (warpage). This spec is 0.03mm. There is also a Peak-to-Valley surface roughness spec after machining of 0.006mm.

Tool Pants · 06-12-2008, 03:00 PM

I have a 1997 with 67,000 miles and my front rotors are the originals and still within specs. I am on my second set of front pads - the first set being when the car was new.

Still have the original rear rotors and pads.

Measure them and see what you got. Depends on how you drive.

Lil bastard · 06-12-2008, 05:27 PM

Rule of thumb with the Boxster is that you get 2 sets of pads to a rotor. So, if you're going to your 3rd set of pads, you probably need rotors too.

jrdiesel01 · 06-13-2008, 05:04 PM

I appreciate your help.

I decided to go with new OEM rotors although originals had 60k miles.

Maybe I can recuperate some money by selling these.

Thanks,

Junior

RandallNeighbour · 06-13-2008, 05:27 PM

If I were going to the trouble of installing brake discs or paying to have them installed, I'd be replacing my worn ones with brand new. I don't think worn Porsche rotors that have been turned have much resale value. A scrap yard will pay you for the raw steel value.