Looking for rear brake pad info

[sanemancured]

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"

[Lee]

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.

[sanemancured]

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.

[Grumpy Goat]

I have new Carbone Lorraine rear pads I never fitted. I will try and get some measurements for you.

[Lee]

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.

[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.

[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

[Grumpy Goat]

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 ...

[sanemancured]

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

[Lee]

I don't move the backing plate to aftermarket brake pads.

[sanemancured]

I don't move the backing plate to aftermarket pads.

Do you check with Debbie first?

[Lee]

I don't move the backing plate to aftermarket pads.

Do you check with Debbie first?

I edited my post

[Grumpy Goat]

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.