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New Brake Discs Thickness issue #4539116
10/10/17 12:22 PM
10/10/17 12:22 PM
Joined: May 2014
Posts: 464
UK
slybunda Offline OP
slybunda  Offline OP
Joined: May 2014
Posts: 464
UK
hey all i forgot to take a photo but will get one up tomorrow. the new brake discs i received (vented ones) have a thicker plate on one side and thinner on the other. is this normal or a manufacturing issue? its the same on both of the discs in the box.
iv seen this on some pagid discs for the aygo and its now happened with the fremax discs i bought for the ford fiesta.
how can this happen from 2 different brands of discs for different cars?

i thought with brake discs the plates should be even thickness on each side?


1995 Ford Fiesta 1.6i 16v Si
2000 Toyota Celica 1.8 VVTL-i
2007 Toyota Aygo+ 1.0i
Re: New Brake Discs Thickness issue [Re: slybunda] #4539119
10/10/17 12:28 PM
10/10/17 12:28 PM
Joined: Aug 2004
Posts: 20,212
CA
The Critic Offline
The Critic  Offline
Joined: Aug 2004
Posts: 20,212
CA
This is normal- some applications will have one side that is thicker than the other.


2011 Toyota Prius - 178k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 133K - Mobil 1 EP HM 5W-30
Re: New Brake Discs Thickness issue [Re: slybunda] #4539175
10/10/17 01:24 PM
10/10/17 01:24 PM
Joined: Feb 2015
Posts: 2,362
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,362
Slovenia EU
Never seen discs like that.... They must be even on both sides...


2008 Toyota Yaris 1ND-TV 1.4 D4-D Elf FullTech FE 5w30
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: New Brake Discs Thickness issue [Re: The Critic] #4539180
10/10/17 01:30 PM
10/10/17 01:30 PM
Joined: May 2014
Posts: 464
UK
slybunda Offline OP
slybunda  Offline OP
Joined: May 2014
Posts: 464
UK
Originally Posted By: The Critic
This is normal- some applications will have one side that is thicker than the other.


Thats odd would it cause vibration or other issues?


1995 Ford Fiesta 1.6i 16v Si
2000 Toyota Celica 1.8 VVTL-i
2007 Toyota Aygo+ 1.0i
Re: New Brake Discs Thickness issue [Re: slybunda] #4539227
10/10/17 02:14 PM
10/10/17 02:14 PM
Joined: May 2005
Posts: 10,567
ROCHESTER, NY
Char Baby Online content
Char Baby  Online Content
Joined: May 2005
Posts: 10,567
ROCHESTER, NY
I have rotors like that. I believe(I'd have to look) the inside(piston side) is thicker than the outside.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: New Brake Discs Thickness issue [Re: slybunda] #4539240
10/10/17 02:27 PM
10/10/17 02:27 PM
Joined: May 2014
Posts: 464
UK
slybunda Offline OP
slybunda  Offline OP
Joined: May 2014
Posts: 464
UK
I just checked and yes the caliper piston side is thicker. Very odd


1995 Ford Fiesta 1.6i 16v Si
2000 Toyota Celica 1.8 VVTL-i
2007 Toyota Aygo+ 1.0i
Re: New Brake Discs Thickness issue [Re: slybunda] #4539246
10/10/17 02:32 PM
10/10/17 02:32 PM
Joined: Aug 2017
Posts: 226
Cincinnati, USA
Dave9 Offline
Dave9  Offline
Joined: Aug 2017
Posts: 226
Cincinnati, USA
Check your old rotors. If they wore evenly on both sides then unequal thickness replacements will have a shorter service live. If they wore more on the piston side then that would suggest the new ones are Just Right for the application.

Re: New Brake Discs Thickness issue [Re: slybunda] #4539260
10/10/17 02:41 PM
10/10/17 02:41 PM
Joined: Feb 2011
Posts: 6,769
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,769
Hudson, NH
pics?


06 Escalade 6.0L LQ9 AWD 165k M1 0w40
03 Maxima 3.5L POS 152k ST HM 10w30
Re: New Brake Discs Thickness issue [Re: slybunda] #4539334
10/10/17 03:29 PM
10/10/17 03:29 PM
Joined: Aug 2002
Posts: 14,567
Silicon Valley
PandaBear Offline
PandaBear  Offline
Joined: Aug 2002
Posts: 14,567
Silicon Valley
It actually make sense as the piston side is more likely to wear out faster, especially if they use different material between inside (more bite) and outside (low dust).


"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah
Re: New Brake Discs Thickness issue [Re: slybunda] #4539763
10/11/17 01:51 AM
10/11/17 01:51 AM
Joined: May 2014
Posts: 464
UK
slybunda Offline OP
slybunda  Offline OP
Joined: May 2014
Posts: 464
UK
iv attached some pics. overall disc thickness iv measured with the vernier caliper is 20mm at different points so it is in spec for overall thickness. however one plate is around 7.4mm thick and the other plate is around 6.5mm thick.
the plate thats caliper piston side is the thicker one.




1995 Ford Fiesta 1.6i 16v Si
2000 Toyota Celica 1.8 VVTL-i
2007 Toyota Aygo+ 1.0i
Re: New Brake Discs Thickness issue [Re: slybunda] #4541040
10/12/17 08:36 AM
10/12/17 08:36 AM
Joined: Jan 2013
Posts: 2,115
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,115
Texas
Never seen that either .

Are you saying one side of the rotor is thicker than the other ?

Wyr
God bless


Wyr
God bless
Re: New Brake Discs Thickness issue [Re: slybunda] #4541060
10/12/17 09:05 AM
10/12/17 09:05 AM
Joined: May 2008
Posts: 2,102
SoCal
UG_Passat Offline
UG_Passat  Offline
Joined: May 2008
Posts: 2,102
SoCal
Considering that most cars uses 1-piston calipers, being thicker on the piston side makes sense, provided that the rotors are balanced properly at the factory


2016 VW Tiguan|APR Stage 1|Neuspeed P-Flo|Osram CBI|Redline 5w30
Re: New Brake Discs Thickness issue [Re: WyrTwister] #4541403
10/12/17 04:31 PM
10/12/17 04:31 PM
Joined: May 2014
Posts: 464
UK
slybunda Offline OP
slybunda  Offline OP
Joined: May 2014
Posts: 464
UK
Originally Posted By: WyrTwister
Never seen that either .

Are you saying one side of the rotor is thicker than the other ?

Wyr
God bless


yes one side is thicker


1995 Ford Fiesta 1.6i 16v Si
2000 Toyota Celica 1.8 VVTL-i
2007 Toyota Aygo+ 1.0i
Re: New Brake Discs Thickness issue [Re: slybunda] #4541417
10/12/17 04:57 PM
10/12/17 04:57 PM
Joined: Jan 2013
Posts: 2,115
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,115
Texas
Wondering it was intended to be that way or if the center line of the casting is off ?

That way on both sides of the car ?

Best wishes , :-)


Wyr
God bless
Re: New Brake Discs Thickness issue [Re: WyrTwister] #4541784
10/13/17 12:46 AM
10/13/17 12:46 AM
Joined: Oct 2011
Posts: 1,463
CA
user52165 Offline
user52165  Offline
Joined: Oct 2011
Posts: 1,463
CA
All you guys saying you never saw this either:

Have not seen many different model discs, or

Saw it but didn't pay attention and did not notice. Not a huge difference but always measureable.

Very common and also very common that pads do not wear evenly inner vs outer.

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