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#4543913 - 10/15/17 10:37 AM Brake Pad Friction Ratings
ET16 Offline


Registered: 10/28/08
Posts: 1285
Loc: 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.

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#4543917 - 10/15/17 10:42 AM Re: Brake Pad Friction Ratings [Re: ET16]
JustinH Offline


Registered: 04/17/04
Posts: 5204
Loc: Texas
rockauto usually posts photos of the brake pad and you can read the friction ratings on the pad.
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#4543929 - 10/15/17 10:48 AM Re: Brake Pad Friction Ratings [Re: ET16]
spasm3 Online   content


Registered: 05/30/10
Posts: 8776
Loc: 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.
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#4543936 - 10/15/17 10:53 AM Re: Brake Pad Friction Ratings [Re: ET16]
JHZR2 Offline



Registered: 12/14/02
Posts: 41896
Loc: 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.

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#4543986 - 10/15/17 11:58 AM Re: Brake Pad Friction Ratings [Re: ET16]
stephen9666 Offline


Registered: 12/08/06
Posts: 3431
Loc: USA
The friction rating doesn't tell the whole story, but I also consider it when buying pads.

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#4543989 - 10/15/17 12:04 PM Re: Brake Pad Friction Ratings [Re: spasm3]
stephen9666 Offline


Registered: 12/08/06
Posts: 3431
Loc: 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.

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#4544015 - 10/15/17 12:26 PM Re: Brake Pad Friction Ratings [Re: JHZR2]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: 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.
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#4544051 - 10/15/17 12:47 PM Re: Brake Pad Friction Ratings [Re: HangFire]
HangFire Offline


Registered: 08/21/13
Posts: 2506
Loc: 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.
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#4544144 - 10/15/17 02:56 PM Re: Brake Pad Friction Ratings [Re: ET16]
skyactiv Offline


Registered: 03/02/13
Posts: 4501
Loc: The Midwest
The factory Bosch brake pads on my GTI have an FG friction rating on them.

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#4544722 - 10/16/17 07:20 AM Re: Brake Pad Friction Ratings [Re: ET16]
ET16 Offline


Registered: 10/28/08
Posts: 1285
Loc: 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?

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#4544789 - 10/16/17 08:19 AM Re: Brake Pad Friction Ratings [Re: ET16]
UG_Passat Offline


Registered: 05/27/08
Posts: 2007
Loc: 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


Edited by UG_Passat (10/16/17 08:20 AM)
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#4546534 - 10/17/17 07:07 PM Re: Brake Pad Friction Ratings [Re: ET16]
Carmudgeon Offline


Registered: 04/26/05
Posts: 557
Loc: 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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