Clicking & play from Mercury hubs, centerlock discs & TRP brakes
09-11-20, 05:48 AM
#1
Newbie
Thread Starter
Join Date: Sep 2020
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Clicking & play from Mercury hubs, centerlock discs & TRP brakes
I'm going crazy trying to get rid of this noise on my new set-up. Any help / ideas would be very much appreciated!!
It's most noticeable when doing balance / technical work. There's play when rocking back and forth with a click. On the back, I can get rid of the click by squeezing the brake very hard but the play is still there. It seems to be at the hubs - the discs are locked solid. The front clicks regardless of break pressure.
Mercury can replicate the play with centerlocks and thinks it may be the centerlock rotors and is sending spacers to try. They also say SRAM rotors may fit better. I've tightened centerlocks beyond spec. I've also added plumbers tape to try and tighten things up - no difference.
I can't tell if the clicking is actually coming from the brakes or just transferred vibrations from the hub. Update: I swapped my old wheels and no clicking at all so it's not the TRP brakes.
Videos of noise / play:
https://vimeo.com/456721077
https://vimeo.com/456721063
https://vimeo.com/456721064
https://vimeo.com/456721062
Equipment:
Mercury X1 Carbon wheelset:
https://www.competitivecyclist.com/m...NDYXQxMDA2NTQ=
TRP G-Spec DH:
https://www.competitivecyclist.com/t...NDYXQxMDAxNTA=
Shimano XTR RT-MT900 Centerlock Disc Rotor:
https://www.competitivecyclist.com/s...NhdDEwMDQ4Nw==
It's most noticeable when doing balance / technical work. There's play when rocking back and forth with a click. On the back, I can get rid of the click by squeezing the brake very hard but the play is still there. It seems to be at the hubs - the discs are locked solid. The front clicks regardless of break pressure.
Mercury can replicate the play with centerlocks and thinks it may be the centerlock rotors and is sending spacers to try. They also say SRAM rotors may fit better. I've tightened centerlocks beyond spec. I've also added plumbers tape to try and tighten things up - no difference.
I can't tell if the clicking is actually coming from the brakes or just transferred vibrations from the hub. Update: I swapped my old wheels and no clicking at all so it's not the TRP brakes.
Videos of noise / play:
https://vimeo.com/456721077
https://vimeo.com/456721063
https://vimeo.com/456721064
https://vimeo.com/456721062
Equipment:
Mercury X1 Carbon wheelset:
https://www.competitivecyclist.com/m...NDYXQxMDA2NTQ=
TRP G-Spec DH:
https://www.competitivecyclist.com/t...NDYXQxMDAxNTA=
Shimano XTR RT-MT900 Centerlock Disc Rotor:
https://www.competitivecyclist.com/s...NhdDEwMDQ4Nw==
Last edited by jt777; 09-11-20 at 05:56 AM. Reason: Update
09-11-20, 07:45 AM
#3
Newbie
Thread Starter
Join Date: Sep 2020
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
It seems like it could be one click of the groove on the center lock. Do you ever remove metal washer below? It may be that spacers will push it out further so that it locks completely.
I have this lock
And the metal washer is on it
09-11-20, 07:55 AM
#4
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
Perhaps the play is in the hub bearings. Can they be adjusted?
09-12-20, 12:20 AM
#5
Senior Member
Join Date: Aug 2006
Posts: 1,895
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 184 Post(s)
Likes: 0
Liked 67 Times
in
53 Posts
It's not uncommon to hear noises when doing what you're doing.
Brake pads aren't a tight fit in the caliper, they can move back and forth in the caliper when you apply the brake and rock the bike back and forth.
Hub/spoke noise: https://www.youtube.com/watch?v=hkpHG2NsBrw
Spoke noise: https://youtu.be/cP1_B580n8E?t=42
06-14-21, 01:21 PM
#7
Newbie
Join Date: Jun 2021
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The clicking noise is coming from the interface between the brake disc and the hub - I’m pretty sure of this since I have exactly the same problem.
On a brand new Cannondale.
the root causes of the problem is that the splines on the hub are too small. I bet when you take the centrelock off the disc rotates 3-4 degrees on the hub?
with the centrelock tightened the disc can still move under heavy load
and when it does; the radial splines on the centrelock jump over ‘one click’ the radial splines on the disk rotor.
it’s a crap design IMHO
On a brand new Cannondale.
the root causes of the problem is that the splines on the hub are too small. I bet when you take the centrelock off the disc rotates 3-4 degrees on the hub?
with the centrelock tightened the disc can still move under heavy load
and when it does; the radial splines on the centrelock jump over ‘one click’ the radial splines on the disk rotor.
it’s a crap design IMHO
