Sooner350

iTrader: (1)

I've got some Stoptech 13 inch rotors with quite a bit of wear. How long, based on the description and picture, could they last?

So I bought a set of used Stoptech st-40 with two piece rotors from RastaSteve in February. It was a great transaction I am very happy, but I knew going into it I had some rotors with 30,000+ miles on them. I've since put another 10,000 miles on them and a total of six days at various tracks.

I am having no braking issues whatsoever. I do not plan to track it until I replace all four rotors, pads and fluid. I am simply daily driving it and trying to use the brakes as little as possible.

The rotors are quite worn, with a somewhat prominent lip on the outer rim of the rotor. This is normal, but becoming worrisome because the wear is greater near the aluminum hats. I measured them with a caliper at 29mm, but it could be less near the hat.

I am also becoming worried about the amount of cracks showing on the face of the rotor. None are large enough to catch your fingernail. They are all very small, but could show deeper issues.

My biggest problem at the moment is finances. I just used up my car fund to replace the differential bushings with SPL and subframes with Whiteline. I felt these parts interact with the drive of the vehicle, and at this time are causing the diving board effect at an ever alarming rate. I figured the brakes, which work fine at the moment, could wait, but my drivetrain could not.

Back to the question at hand. Would you, esteemed owners of 350Zs, risk your **** and wait to save money for new brakes? Or would you sell some stock, take a loss and replace the brakes?

Nexx

iTrader: (41)

i would estimate they will last until they break.

Sooner350

iTrader: (1)

True, but I'm hoping to avoid that.

Quit trying to raise your post count mister I have more than 13,000 posts.

idrive_MD

iTrader: (8)

You know what you need to. replace them if you are worried about it, otherwise park the car or drive it only for DD purposes until you can afford to replace them.

Parker01

iTrader: (1)

Hmm interesting, my rotors are pooched too but not to the point of cracking! I would have the things replaced forsure if they ever were to show cracks. Right now I'm just puddering around town for the most part and have my street pads in so I'm not too concerned.

It scares me that you can see cracks although the cracks are probably from heating/cooling at the track and not street driving. Try doing longer cool down sessions, even if the track marshals are being boners try finding a place off the track to continue your cool down to help prevent cracking.

Just keep in mind that a rotor cracking while driving is likely to be quite catastrophic, probably similar to getting a stick in your bicycle spokes when you were a kid. If the rotor were to actually break it would probably misalign itself and catch your caliper/pads and destroy them and cause you to lose control.

scotts300

iTrader: (46)

Microcracks are fine and typical. Small cracks will eventually turn into big cracks - the catch-your-nails kind. If you don't have any of those, no need to worry; just keep a close inspection every few weeks.

terrasmak

iTrader: (8)

Mine are much worse than that, and still going strong.

angelo350z

iTrader: (3)

Yeah, I was gonna say ... I see a lot of GOVs with WORSE rotors and they typically won't get replaced until they're about to fall apart.

Sooner350

iTrader: (1)

OK, I have a little more confidence in them, but will still replace them as soon as possible. It shouldn't take too long to save the money, but in the meantime I guess I'll be driving like your blind, hunch-backed, 87-year-old grandma.

terrasmak

iTrader: (8)

Why, mine are worse and will get replaced at the end of the season. I still have 2 more time attacks left.

winchman

Just don't wait till they look like this.

terrasmak

iTrader: (8)

Thats from driving on brake pads that are worn to the metal, then driving them metal to metal for a long time.

Mike@Blackline

iTrader: (37)

thats how my suburban rotors looked when i bought it. bad previous owner ftl

Xzero

iTrader: (2)

Or because the wear is on one side, it could be from a seized caliper keeping the pad pressed up against it.