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Brake Pad Friction Ratings #4543913
10/15/17 10:37 AM
10/15/17 10:37 AM
Joined: Oct 2008
Posts: 1,309
MD
ET16 Offline OP
ET16  Offline OP
Joined: Oct 2008
Posts: 1,309
MD
Shopping for pads for my Saab, I was surprised how hard it was to find out the friction ratings. I was looking for FF or better, but found few that published the rating or had a picture showing the rating on the pads.

Re: Brake Pad Friction Ratings [Re: ET16] #4543917
10/15/17 10:42 AM
10/15/17 10:42 AM
Joined: Apr 2004
Posts: 5,209
Texas
JustinH Offline
JustinH  Offline
Joined: Apr 2004
Posts: 5,209
Texas
rockauto usually posts photos of the brake pad and you can read the friction ratings on the pad.


'11 Hyundai Sonata GLS
'11 Scion XB
Re: Brake Pad Friction Ratings [Re: ET16] #4543929
10/15/17 10:48 AM
10/15/17 10:48 AM
Joined: May 2010
Posts: 9,060
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,060
North Carolina


The problem is the cross over. If you look at the chart, and ff pad could also be called a gg at .45. An EE pad could be called an FF pad at .35.


13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30
Re: Brake Pad Friction Ratings [Re: ET16] #4543936
10/15/17 10:53 AM
10/15/17 10:53 AM
Joined: Dec 2002
Posts: 42,088
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,088
New Jersey
The odd thing is I've had some "lower" friction pads that felt more grippy than higher rated ones that have replaced them.

Re: Brake Pad Friction Ratings [Re: ET16] #4543986
10/15/17 11:58 AM
10/15/17 11:58 AM
Joined: Dec 2006
Posts: 3,431
USA
stephen9666 Offline
stephen9666  Offline
Joined: Dec 2006
Posts: 3,431
USA
The friction rating doesn't tell the whole story, but I also consider it when buying pads.

Re: Brake Pad Friction Ratings [Re: spasm3] #4543989
10/15/17 12:04 PM
10/15/17 12:04 PM
Joined: Dec 2006
Posts: 3,431
USA
stephen9666 Offline
stephen9666  Offline
Joined: Dec 2006
Posts: 3,431
USA
Originally Posted By: spasm3


The problem is the cross over. If you look at the chart, and ff pad could also be called a gg at .45. An EE pad could be called an FF pad at .35.


You might be overly concerned about "cross over." If the chart is accurate, the coefficient would have to be a single exact number to fall on the edge. If it's .01 either way it's a different designation.

Re: Brake Pad Friction Ratings [Re: JHZR2] #4544015
10/15/17 12:26 PM
10/15/17 12:26 PM
Joined: Aug 2013
Posts: 2,531
Central Maryland
HangFire Offline
HangFire  Offline
Joined: Aug 2013
Posts: 2,531
Central Maryland
Originally Posted By: JHZR2
The odd thing is I've had some "lower" friction pads that felt more grippy than higher rated ones that have replaced them.

Not odd at all. Cheap soft grippy-feel pads can fade a lot when hot, and thus get a lower rating.
Originally Posted By: stephen9666
The friction rating doesn't tell the whole story, but I also consider it when buying pads.

This.


Various musings: http://hangfire.net
Re: Brake Pad Friction Ratings [Re: HangFire] #4544051
10/15/17 12:47 PM
10/15/17 12:47 PM
Joined: Aug 2013
Posts: 2,531
Central Maryland
HangFire Offline
HangFire  Offline
Joined: Aug 2013
Posts: 2,531
Central Maryland
Originally Posted By: HangFire
[quote=JHZR2]The odd thing is I've had some "lower" friction pads that felt more grippy than higher rated ones that have replaced them.

Not odd at all. Cheap soft grippy-feel pads can fade a lot when hot, and thus get a lower rating.
Originally Posted By: stephen9666
The friction rating doesn't tell the whole story, but I also consider it when buying pads.

This.
Originally Posted By: JustinH
rockauto usually posts photos of the brake pad and you can read the friction ratings on the pad.

and I thank them for that. I've pinged a few other websites about publishing this information, either crickets or nonsense responses, listing what's already on the site and no acknowledgement that the info I'm asking for is still missing.


Various musings: http://hangfire.net
Re: Brake Pad Friction Ratings [Re: ET16] #4544144
10/15/17 02:56 PM
10/15/17 02:56 PM
Joined: Mar 2013
Posts: 4,780
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,780
The Midwest
The factory Bosch brake pads on my GTI have an FG friction rating on them.



Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Brake Pad Friction Ratings [Re: ET16] #4544722
10/16/17 07:20 AM
10/16/17 07:20 AM
Joined: Oct 2008
Posts: 1,309
MD
ET16 Offline OP
ET16  Offline OP
Joined: Oct 2008
Posts: 1,309
MD
The other thing I don't completely understand is where the 90R rating comes in. This only certifies that aftermarket pads are close to OEM in performance, right?

Re: Brake Pad Friction Ratings [Re: ET16] #4544789
10/16/17 08:19 AM
10/16/17 08:19 AM
Joined: May 2008
Posts: 2,016
NJ
UG_Passat Offline
UG_Passat  Offline
Joined: May 2008
Posts: 2,016
NJ
Originally Posted By: ET16
The other thing I don't completely understand is where the 90R rating comes in. This only certifies that aftermarket pads are close to OEM in performance, right?


It's is a ECE R90 regulation, which yes, coincides with OEM in performance (meeting or better), which also has country code stamping also

Last edited by UG_Passat; 10/16/17 08:20 AM.

2016 VW Tiguan|APR Stage 1|Neuspeed P-Flo|Osram CBI|Redline 5w30
Re: Brake Pad Friction Ratings [Re: ET16] #4546534
10/17/17 07:07 PM
10/17/17 07:07 PM
Joined: Apr 2005
Posts: 584
Under the hood
Carmudgeon Offline
Carmudgeon  Offline
Joined: Apr 2005
Posts: 584
Under the hood
Pad friction ratings are like UTQG tire ratings.

Objective, and meant to be useful, but only to a limited extent.


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