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I have problem with my SRAM force axs brakes, I bought new disc brake rotors and as well brake pads, cleaned it all changed it, but yet when I brake it just totally judders or vibrates it just doesn’t brake 100% at all, I don’t know what to do already, I checked every single component and it’s all properly tight up under its torque. As well did bedding for the pads as I’ve ridden on the bike thousand km. Can anybody help? I have Giant Defy Advanced Pro. Last thing I’m thinking about is what if the frame is just defective, can it somehow affect the brakes in a way to cause these symptoms? I went to 10 mechanics, none can help.

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    Has the brake ever worked as expected ? Do you get the same results from front and rear brake identical ?
    – Criggie
    Aug 23, 2023 at 2:42
  • Ever since I bought the bike which is this year march it has same issue, and nothing has helped and worked to get rid of it. Yes front and rear brake have same problem.
    – Natalie G.
    Aug 23, 2023 at 16:56
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    Its 6 months old, has never worked right, and you've taken it to 10 mechanics none of whom could fix it? Take it back to the shop where you bought it and claim on warranty.
    – Criggie
    Aug 23, 2023 at 23:36
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    Oh man this could be a tough one. Can you add any photos of your bike? That might help give us something to look over.
    – Criggie
    Aug 24, 2023 at 2:32
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    @Criggie just added a picture of 3 days old front disc brake rotor, the bike is precise even not scratches, no other defects than thes brakes.
    – Natalie G.
    Aug 24, 2023 at 2:47

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I had a similar set of symptoms on a set of brakes a few years back. I was using organic pads and even when making sure the surfaces were clean and carefully bedding the pads in, the front brake would shudder excessively, especially at slower speeds. Wetting the pads would stop the shuddering and smooth braking would be seen, but soon the shuddering would return.

My eventual solution was to switch out the organic pads to a semi-metallic ones. Braking became smooth, predictable, and consistent. To this day I don’t know why the switch to semi-metallic pads resolved the problem, but if you are at the end of your rope on this problem, it may be worth a try.

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  • Yes I have switched to both of those you mentioning, but yet it didn’t make the issue go away, it’s the same, I already spent fortune on it switching pads or blending them with metallic organic, nothing helps
    – Natalie G.
    Aug 23, 2023 at 16:55
  • Would you have any other suggestion? @tedhohl
    – Natalie G.
    Aug 23, 2023 at 20:41
  • @NatalieG. I wish I could offer more. I was hoping it was a similar solution, but I see you have already mentioned that you have tried this now. In my situation I was approaching my wits end as the bike was new, the original pads were not fouled/contaminated and the system was properly bled. If I got the organic pads to work smoothly, one trip down the mountain (going easy on the brakes to not cook them) and the horrible shuddering would return. I feel your frustration, and I wish I could offer another suggestion that you have not tried yet.
    – Ted Hohl
    Aug 24, 2023 at 4:51
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    thank you though, I think I will still investigate
    – Natalie G.
    Aug 24, 2023 at 18:26

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