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I've posted the following on UKGSer. I thought I'd try here too.
"Yo!
I'm looking for some information about rear brake pads that fit the WC 1200/1250 GS/GSA/RT/RS/R
I'm after pad and backing plate thickness for new, unused pads, OEM and any other makes you may have.
I've had a binding rear brake and damaged disc due to fitting the backing/anti squeal plate to Ferodo pads (which are presumably thicker).
It's be useful to know how other pad thicknesses vary in relation to the OEM pads so other folk don't go through the same issue.
Pedro"
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From my notes, the pad thickness on the OEM rear brakes is 4mm. (not including the backing plate)
Metal backing plate pus the anti squeal plate is 5.7mm.
Metal backing plate on the one without the anti squeal plate is 3.6mm.
I do not have a new set on hand to double check the 4mm measurement.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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(01-27-2022, 08:49 AM)Lee Wrote: From my notes, the pad thickness on the OEM rear brakes is 4mm. (not including the backing plate)
Metal backing plate pus the anti squeal plate is 5.7mm.
Metal backing plate on the one without the anti squeal plate is 3.6mm.
I do not have a new set on hand to double check the 4mm measurement.
Thank you Lee. That is very useful.
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I have new Carbone Lorraine rear pads I never fitted. I will try and get some measurements for you.
Regards,
Grumpy Goat
2016 BMW R1200RS
2023 Triumph Tiger 900 Rally Pro
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01-27-2022, 02:33 PM
(This post was last modified: 01-28-2022, 08:24 AM by Lee.)
(01-27-2022, 12:59 PM)Grumpy Goat Wrote: I have new Carbone Lorraine rear pads I never fitted. I will try and get some measurements for you.
I'd like to see that info. I remember thinking the Carbone Lorraine pads looked a little thinner than OEM pads.
I've used Carbone Lorraine as replacements on the last few bikes.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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01-28-2022, 04:20 AM
(This post was last modified: 01-28-2022, 04:20 AM by sanemancured.)
I have some Brembo sintered pads (red painted) and they are also 4mm of pad material and 3.7mm back plate.
I suspect that the Ferodo ones I fitted were considerably thicker.
I'll ask the supplier to see if they'll measure a set.
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01-28-2022, 05:00 AM
(This post was last modified: 01-28-2022, 07:59 AM by sanemancured.)
The spec sheet for the Ferodo FDB2006ST pads that I fitted says that the thickness is 4mm pad material and 3.7mm plate. So there shouldn't have been a problem. Motorworks (UK) who supplied them are checking a set for me.
Of course I could just have been unlucky and received an oversize set. Motorworks have confirmed that the pads in stock are exactly the same size as the OEM pads.
Whatever, sorting the issue has cost me 3 sets of pads, pistons, seals, pin grommets, a new rear disc and bolts!
Peter
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Peter - whatever finally solves it please do keep this thread updated. As you know I am very focused on working on the bike and not just farkling and gazing at the lint in one's navel ...
Regards,
Grumpy Goat
2016 BMW R1200RS
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01-28-2022, 08:52 AM
(This post was last modified: 01-28-2022, 08:52 AM by sanemancured.)
(01-28-2022, 08:25 AM)Grumpy Goat Wrote: Peter - whatever finally solves it please do keep this thread updated. As you know I am very focused on working on the bike and not just farkling and gazing at the lint in one's navel ... Thank you Wayne
I would simply recommend not fitting the anti-squeal plate to any aftermarket rear pads that are greater in overall width than 7.7mm each side.
The Ferodo replacements that I used seemed much thicker than they should have been although I didn't have any OEM available to compare with. I suspect I got a defective, over thickness set?
I have spoken with a BMW trained tech who has his own independent workshop. He only uses Brembo pads (my spare Brembo set measure correctly at 7.7mm) and he does use the backing plate.
I spoke with another mechanic who works on BMWs and he never uses the backing plate on any aftermarket pads!
If anyone fits the backing plate with replacement pads and has any issues with binding I'd suggest removing it. I went down the road of possible sticky pistons or sticky calliper pins and think that was a false avenue which led to other issues.
The Ferodo pad on the inside nearest the wheel wore down to the very limit in less than 4,000 miles (compared with the originals at 30,000) and the disc is a mess.
Peter
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01-28-2022, 10:38 AM
(This post was last modified: 01-28-2022, 12:25 PM by Lee.)
I don't move the backing plate to aftermarket brake pads.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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(01-28-2022, 10:38 AM)Lee Wrote: I don't move the backing plate to aftermarket pads.
Do you check with Debbie first?
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(01-28-2022, 12:14 PM)sanemancured Wrote: (01-28-2022, 10:38 AM)Lee Wrote: I don't move the backing plate to aftermarket pads.
Do you check with Debbie first?
I edited my post
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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Well, I just looked for my Carbone Lorraine rear pads and could not find them! Its been a few years since I last saw them but there are only a couple of places they could be in my garage and they are not there. Will have another look and update the thread if I find them.
Regards,
Grumpy Goat
2016 BMW R1200RS
2023 Triumph Tiger 900 Rally Pro
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