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Can anyone help with this problem, please?

Whenever I brake with the front brake, I always get the angry bee sounds.
Bike: Canyon Endurace (2020).
Brakes: Shimano 105 R7070 hydraulic.
Pads: Shimano K03S Resin.

I’ve cleaned the pads, brake housing and calipers, even flossing them with string.
Plus bleeding them, removing all air bubbles, and pressing the calipers back out. And also forcing the pad spring further apart with screwdriver shaft.

But after 2 rides the noise returns.
The pads aren’t brand new, maybe half way through their lifecycle.
They seem to be closing in simultaneously.

Do you think I should take the brake housing apart, so I can properly clean the calipers?

Thank you.

Topic

[Pilot Pete]

That’s the end cap, isn’t it

That’s the end cap, isn’t it removable so you can get your tool to fit? Having said that 3500 miles shouldn’t mean the rotor is worn out. But swapping them to see if you still get the same noise under braking should eliminate the rotor (or point to it as the cause).

PP

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Thank you for the suggestion.
Thank you for the suggestion.
I’m not sure if the rotors are worn. The bike is 9 months old.
Maybe 3.5 k miles on the clock.
I’ve already replaced the threaded BB. So maybe it is time replace the rotors.

The cassette tool I’m using does fit the front brake centre lock, but doesn’t fit over the hub’s axle “casing”. I’ll have to get the Dremel out to modify it.

Edit: yes a buzz sound, not a squeal.

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Thank you
Thank you 🙂

[ktache]

Any noise is of course coming

Any noise is of course coming from (hopefully unesassary) vibration, maybe something is resonating.  This somehow needs damping.  Tighten everything up a bit, maybe even a little more tension on the top cap on the forks.

A careful and light smear of Copper Lock betwwen pads and pistons wouldn’t hurt.

It was Edd’s go to on Wheeler Dealers.  Ant is good but I miss Edd.

In their “New” series on Quest they seem to be doing UK available cars but in the US.  Which is nice.

[Pilot Pete]

Are you sure it’s not the

Are you sure it’s not the rotor itself that is worn? When you say ‘angry bee’ I’m picturing more of a buzz than a squeal yes? I’ve had that sort of sound caused by the rotor before.

Assuming front and rear rotors are the same size you could swap them around to see if that eliminates the problem on the front.

PP

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Thank you for the advice.
Thank you for the advice.
I’ve tried caliper adjustment, but not the other two suggestions.

[HoarseMann]

could be caliper alignment?

could be caliper alignment? worth unbolting the caliper and re-adjusting just to see if it makes a difference.

try a different pad compound? sintered?

try a *very* small amount of high temp grease thinly applied to the back of the pads where they contact the pistons.

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Thanks for the help.
Thanks for the help.
I’ve had the problem for months. Yes, sometimes I’ve cleaned the rotors with isopropyl alcohol, and also used emery paper on the pads, and other times I’ve not done that.
Just to save the “hassle” of bedding in the brakes again.

The back has always remained quiet for me 😉

[pablo]

Did you clean the disc as
Did you clean the disc as well? What did you clean with? Car brake cleaner is the best think to use. You can also sand the pad down slightly using a fine paper. Ive never had a front be noisy it’s normally the back with all the oil and crap that gets thrown up

[Author]

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