Juddering front disc brake

secretsam
secretsam Posts: 5,120
edited October 2022 in Workshop
As per the title, this is my issue. Now, the bike is a mish-mash, using:
- Frame: Kinesis non-tapered CX frame
- Fork: Paul Milne's supplied carbon/alloy
- Brake: TRP Hy-Rd (cable operated but hydraulic actuation)
- Rotor: Shimano, non-ICE
- Wheel: QR from another bike, never had issues with that

I have tried tightening the headset, stem, changing the skewer on the QR, all to no avail.

Bike stops OK (the TRPs are OK for cable discs) but it judders a lot under hard braking.

Help!
It's just a hill. Get over it.

Comments

  • seanoconn
    seanoconn Posts: 11,739
    secretsam said:

    As per the title, this is my issue. Now, the bike is a mish-mash, using:
    - Frame: Kinesis non-tapered CX frame
    - Fork: Paul Milne's supplied carbon/alloy
    - Brake: TRP Hy-Rd (cable operated but hydraulic actuation)
    - Rotor: Shimano, non-ICE
    - Wheel: QR from another bike, never had issues with that

    I have tried tightening the headset, stem, changing the skewer on the QR, all to no avail.

    Bike stops OK (the TRPs are OK for cable discs) but it judders a lot under hard braking.

    Help!

    Is the brake new?
    Pinno, מלך אידיוט וחרא מכונאי
  • joeyhalloran
    joeyhalloran Posts: 1,080
    If the headset is tight it will likely be the movement in the brake pads. Are the pads original?
  • i.bhamra
    i.bhamra Posts: 304
    Have you checked your caliper hasn't come loose? Any contamination/irregularities on disc surface? Obvious things you've probably checked already!
  • veronese68
    veronese68 Posts: 27,866
    As above, check everything is tight first as that's easiest, then cantamination.
    Kinesis Pro6
    Marin Nail Trail
    Cotic Solaris
  • whyamihere
    whyamihere Posts: 7,716
    edited October 2022
    I wouldn't be surprised if it's the fork - I had something similar on an old bike which I upgraded with a carbon/alu non-tapered fork from Condor - The juddering down a steep hill felt so dangerous that I immediately took it back off.
  • secretsam
    secretsam Posts: 5,120
    I'll try cleaning the caliper and pad, and then tightening the bolts - in answer to some queries, it was all 'as new'
    It's just a hill. Get over it.
  • secretsam
    secretsam Posts: 5,120
    whyamihere said:

    I wouldn't be surprised if it's the fork - I had something similar on an old bike which I upgraded with a carbon/alu non-tapered fork from Condor - The juddering down a steep hill felt so dangerous that I immediately took it back off.

    how did you get home?!?!?!? :D
    It's just a hill. Get over it.
  • whyamihere
    whyamihere Posts: 7,716
    secretsam said:

    whyamihere said:

    I wouldn't be surprised if it's the fork - I had something similar on an old bike which I upgraded with a carbon/alu non-tapered fork from Condor - The juddering down a steep hill felt so dangerous that I immediately took it back off.

    how did you get home?!?!?!? :D
    Ok, maybe not immediately...
  • seanoconn
    seanoconn Posts: 11,739
    secretsam said:

    I'll try cleaning the caliper and pad, and then tightening the bolts - in answer to some queries, it was all 'as new'

    If as new. Trying braking hard on a few descents. Sorted my front judder out on new brakes.
    Pinno, מלך אידיוט וחרא מכונאי
  • secretsam
    secretsam Posts: 5,120
    seanoconn said:

    secretsam said:

    I'll try cleaning the caliper and pad, and then tightening the bolts - in answer to some queries, it was all 'as new'

    If as new. Trying braking hard on a few descents. Sorted my front judder out on new brakes.
    Nah, they were as-new, now they are as-used
    It's just a hill. Get over it.

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