On 11/22/2019 2:02 AM, wrote:
On Friday, November 22, 2019 at 2:22:21 AM UTC+1, Frank Krygowski wrote:
On 11/20/2019 9:02 PM, jbeattie wrote:
On Wednesday, November 20, 2019 at 11:07:59 AM UTC-8, Andrew Chaplin wrote:
I have been riding a gravel bike (Kona Rove NRB DL https://www.konaworld.com/rove_nrb_dl.cfm) for a year now. It has developed a tendency to drag the pads of the front brakes against the disc. I recently had the pads and rotor, front and rear, replaced (about 5,000 Km of use). As I ride, a noise comes from the front brake that suggests that the pads are touching the rotor, and it increases in volume until I "blip" the lever, which makes it go away for maybe another Km or so--or less.

Has anyone encountered this before? if yes, how did you solve it?

Yikes, you must do a lot of braking. 3K miles for a rotor doesn't seem like much.

Anyway, you may just need to reset your pistons. https://www.epicbleedsolutions.com/r...liper-pistons/ If that doesn't work, then the next thing is checking to make sure the caliper is centered. Like Andrew says, just follow the instructions for installation/alignment. https://www.youtube.com/watch?v=uk_nC9anQcM&t=13s

If that doesn't do it, check to make sure that both pistons are retracting. I have a piston that will drag occasionally, and I need to clean it. Follow this routine: https://www.youtube.com/watch?v=vQXF...&feature=youtu

I just got around to watching those.

The last procedure especially seems to be a real pain. And it's required
by mere dirt? Sheesh.


--
- Frank Krygowski

Many people expect that when getting disk brakes they will get a maintenance free system. Thats is not the case. Cleaning the pistons once in a while is something I do to prevent pad drag which in most cases is only a mental issue. Cleaning the pistons is no more work than getting the metal parts out of the brake pads and/or sanding the brake areas of the rims after a rainy and muddy ride with caliper brakes and the sound that caliper brakepads make with metal parts inbedded is much worse than than little drag sound disk brakes make. YMMV.

Lou

+1
Neither is 'better' overall. They're different each with
their own features and foibles.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971