STARTING thickness of M rotors?

Kgolf31 · 07-28-2012, 08:24 PM

I mic'ed my rotors today, my fronts are at 27.8mm and rears at 19.3mm

Above the minimums, obviously.

I was wondering though what the actual starting thickness the rotors are at. I'm just trying to figure out how long it took to get from starting to current. With that information I can just guesstimate how much longer I can expect out of the rotors with auto-xing and a HPDE event at mid-ohio coming up.

Thanks guys.

kcdedric · 07-28-2012, 10:58 PM

28.0mm front and 20.0mm rear I believe.

Kgolf31 · 07-29-2012, 09:03 PM

Quote:

Originally Posted by kcdedric

28.0mm front and 20.0mm rear I believe.

20.0mm sounds okay. But i don't know about 28.0mm. I got some serious shouldering on the front and it's hard to believe that's 0.2mm

Thanks for the information though! Good starting point.

The HACK · 07-30-2012, 11:27 AM

Front rotor: 345x28mm

Rear rotor: 328x20mm

If I recall, the original thickness is stamped on the rotor hat as well as the minimum thickness. But I haven't had the OEM front rotor since, oh, 2006 so my memory is hazy. Should probably check my rear rotor thickness, I mean, after all, they're more than 6 years old now with 36,000+ very hard driven miles.

Kgolf31 · 07-30-2012, 12:01 PM

Quote:

Originally Posted by The HACK

Front rotor: 345x28mm

Rear rotor: 328x20mm

If I recall, the original thickness is stamped on the rotor hat as well as the minimum thickness. But I haven't had the OEM front rotor since, oh, 2006 so my memory is hazy. Should probably check my rear rotor thickness, I mean, after all, they're more than 6 years old now with 36,000+ very hard driven miles.

I retract my previous statement. Interesting. I'm surprised how much shouldering I have on the rears regardless. Just odd.

Either way, I got plenty of life for another year to 2!

07-28-2012, 08:24 PM	#1
Kgolf31 Brigadier General 459 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	STARTING thickness of M rotors? I mic'ed my rotors today, my fronts are at 27.8mm and rears at 19.3mm Above the minimums, obviously. I was wondering though what the actual starting thickness the rotors are at. I'm just trying to figure out how long it took to get from starting to current. With that information I can just guesstimate how much longer I can expect out of the rotors with auto-xing and a HPDE event at mid-ohio coming up. Thanks guys.
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07-28-2012, 10:58 PM	#2
kcdedric Captain 743 Rep 647 Posts Drives: E90 M3 Join Date: Apr 2011 Location: Norcal iTrader: (7)	28.0mm front and 20.0mm rear I believe. __________________ Le Mans Blue '09 BMW M3 Sedan - Current Polar Silver '04 Porsche GT3 - Gone Persian Blue '08 Lotus Exige S240 - Gone Space Gray/Imola '08 BMW M Coupe - Gone
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07-30-2012, 11:27 AM	#4
The HACK Midlife Crises Racing Silent but Deadly Class 1820 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	Front rotor: 345x28mm Rear rotor: 328x20mm If I recall, the original thickness is stamped on the rotor hat as well as the minimum thickness. But I haven't had the OEM front rotor since, oh, 2006 so my memory is hazy. Should probably check my rear rotor thickness, I mean, after all, they're more than 6 years old now with 36,000+ very hard driven miles. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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