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I agree with everything you said, with one rather large exception. While uneven pad wear radially USUALLY means a sticking piston or stuck calipers, in this case it was purely and simply BECAUSE OF THE PAD BACKER DESIGN.
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I have had a look at the installation of my pads.....
they are sitting flat against the moving caliper and do not appear to have had anything ground off them.
As I am not taking them off to check, perhaps you can tell me if the caliper contact face is solid or recessed (ie is there a space for the nipples to sit in?)
I will speak with my installer about them and get his feedback on what the differences are.
Clearly my pads are fitted differently.....
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Another observation: while the Red Stuff did dust less than stock, they dusted more than I experienced with Axxis D+ on prior cars. And one of those cars was a high mass, high HP M5 that I tended to operate at higher speeds, so I don't think the added heft of the X5 is necessarily the differentiator.
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As I said in my original post when I found the pads, it takes a few weeks to settle down and the rears take longer. I would think you haven't had them on long enough because of your problems. Speed and mass on different cars don't produce the same results IMHO.
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The other thing of grave concern to me is the conditions of the friction material after a typical bedding procedure and relatively normal around-town use since install. For a high performance compound, these pads look worse than any pad I EVER used on my M5--even for heavy track use!
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There is nothing in those photos that wouldn't happen on another pad brand fitted like that. They are bent out of shape because the load is over the nipples, rather than the whole face. Your pads are obviously warped either by incorrect installation, incorrect type or as you say incorrect manufacturing.
I am sure the apologies will be volumnous from EBC if either of the last two are true......