Sport Package Rotor Thickness
 

Hey guys,

I have a '12 370Z Sport Package. I need to know front and read rotor thickness (new) and also what is a solid thickness for the track. I am just a casual track day guy.

Just had a full brake job done with new fluid, pads and turned rotors even though I dont believe they needed to be turned since breaks have always been smooth and strong. Car has about 29K miles. Not sure if the rotors I have are original or not.


Thanks!

Minimum thickness for Sport is 30mm front and 18mm rear .......... new size is 32mm and 20mm

By minimum thickness does that mean within the realm of peak performance out of the rotor or strictly for minimum safety standards which would clearly be nowhere close to track standard thickness. I would think for it to still be safe for a track it would have to be dam near close to the original thickness of the new rotor.

Thank you for your input. Hopefully you have further insight :)

I've worn rotors down well past what they should be on the track and had no problems on other cars. To answer your question though, a thicker rotor will absorb more heat before transferring it to your pads so thicker would technically be best for the track.

Glad I could help
-Read

Hey, what is your source for that info? Just went to the dealer to get my rotors measured and they showed me the spec's they are saying that 32mm front and 20mm rear are minimum thickness. Just trying to get a clear answer now that I am hearing two different things.

Thanks!

Dealer is FoS and a WOFTAM

Whatever the dealer showed you is the stock original thickness and not minimums.

Once worn below minimums, with repeated heat cycles, the risk of cracks from inner to outer edge followed by catastrophic rotor failure rises significantly.

That is not to say you will see rotor failure, just that the risk of that event rises substantially.

For the record, I checked on the DBA website, but the data is also in the Z34 FSM which you can see online.

Look inside a rotor (from the backside) and it will tell you its minimum thickness

Tracy Ramsey

At the track you are more concerned about rotor cracks then rotor thickness. They start out as small hairlines in the center of the rotor surface and gradually gets longer and wider.

I have a garage full of rotors that have plenty of thickness but are just too severely cracked for me to trust them on the track.

Good to know! thank you,

I checked the data online on the Z34 FSM and found the rotor specs. I see the page the dealer showed me but come to find out there was a second page. Maybe you can help clarify these 4 lines I see. Page BR-64 and BR-65 btw. No questions on rotor diameter as that is obvious.

FRONT 4 PISTON, REAR 2 PISTON TYPE
- Front brake (Rotor outer diameter x thickness) 355mm x 32mm
- Read brake (Rotor outer diameter x thickness) 350mm x 20mm


- WEAR THICKNESS FRONT ROTOR = 30mm
- WEAR THICKNESS REAR ROTOR = 26mm <---problem causing confusion

My rotor measurements:

FR: 32.2mm
FL: 31.9mm
RL: 20.2mm
RR: 20.4mm

Also, if the measurements above are "new" how are my used rotors bigger? I assume maybe because a micrometer could be slightly calibrated wrong.

Unless I am understanding this wrong how is the "wear thickness" larger than the supposedly new thickness above. Since the front rotor wear thickness is 2mm less than the new, i would assume the wear thickness from the rear would be about 1-2 yielding 18-19mm but instead these specs are showing the rear wear thickness LARGER than the new thickness

Any thoughts?

Sh!t lol just saw how i read it wrong. BGTV8 you are right! 32/20 new 30/18 minimum. 2nd page organizes it weird.

Thank you all for your help.