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#1
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Creeping brake pad drag
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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO |
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#2
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Creeping brake pad drag
On 2019-11-20 11:07, 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? Yes. My MTB often sounds like a truck. ... if yes, how did you solve it? -- By ignoring it :-) It doesn't produce noticeable real drag but occasionally startles animals. I ask them to forgive me but not sure if they understand. -- Regards, Joerg http://www.analogconsultants.com/ |
#3
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Creeping brake pad drag
On 11/20/2019 1:07 PM, 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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO Likely pads are not centered and parallel which is usually obvious on inspection. Review the setup directions for your brake. Start with the inner pad adjustment tight, center the caliper to the rotor, secure it and then do your final adjustment. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#4
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Creeping brake pad drag
On 11/20/2019 2:07 PM, 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? I encountered something vaguely similar on a bike owned by a touring cyclist who was visiting. I had repaired some other stuff on the guy's bike and took the bike on a test ride around the block. I couldn't fix the disc noise for him, but he seemed strangely unbothered by it. Another friend had a similar problem with his rear disc on a new bike he bought this past spring. For him, the noises occurred sporadically, mostly when he was climbing out of the saddle. IIRC it took three trips back to the shop to get it to stop. I never learned how the shop fixed it. (That friend's not very mechanical.) I prevented the problem for _me_ by not buying a disc brake bike. YMMV. -- - Frank Krygowski |
#5
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Creeping brake pad drag
On Wednesday, November 20, 2019 at 11:45:24 AM UTC-8, AMuzi wrote:
On 11/20/2019 1:07 PM, 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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO Likely pads are not centered and parallel which is usually obvious on inspection. Review the setup directions for your brake. Start with the inner pad adjustment tight, center the caliper to the rotor, secure it and then do your final adjustment. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 This was one of the original complaints I had against disk brakes. As Joerg says, it doesn't seem to cause any noticeable drag but it does make noise and it does cause the pads to wear out faster. |
#6
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Creeping brake pad drag
On 2019-11-20 13:50, Tom Kunich wrote:
On Wednesday, November 20, 2019 at 11:45:24 AM UTC-8, AMuzi wrote: On 11/20/2019 1:07 PM, 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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO Likely pads are not centered and parallel which is usually obvious on inspection. Review the setup directions for your brake. Start with the inner pad adjustment tight, center the caliper to the rotor, secure it and then do your final adjustment. When I had the MTB new I was babying this sort of stuff. To keep it totally quiet required constant alignment, every 10 rides or so. Too much and it's only a matter of time until the aluminum threads waller out, which would present a serious problem. Meantime I upgraded to 8" rotors front and back and the adapter has its own threads. However, I just don't fuss about a wee noise anymore. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 This was one of the original complaints I had against disk brakes. As Joerg says, it doesn't seem to cause any noticeable drag but it does make noise and it does cause the pads to wear out faster. My impression is that it doesn't impact the pad wear much. When I ride my MTB on flatland trails there is hardly any pad wear while in the hills it's substantial. -- Regards, Joerg http://www.analogconsultants.com/ |
#7
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Creeping brake pad drag
On 21/11/19 6:45 am, AMuzi wrote:
On 11/20/2019 1:07 PM, 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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO Likely pads are not centered and parallel which is usually obvious on inspection. Review the setup directions for your brake. Start with the inner pad adjustment tight, center the caliper to the rotor, secure it and then do your final adjustment. Wouldn't they be hydraulic brakes? I agree with checking that the calipers are properly located on the mount so that the pads are aligned with the rotor, and I would think bleeding the brakes might help? -- JS |
#8
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Creeping brake pad drag
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 Another outside possibility is that the system is over-filled, so if all else fails, bleed it and refill it. And if all that doesn't work, buy a new caliper -- you could just have a bad one (there can be issues with seals and pistons). The notion that a hydraulic road disc will inevitably drag and make noise is wrong. I have hydraulic discs on three bikes, and they drag only when there is an issue. -- Jay Beattie. |
#9
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Creeping brake pad drag
On Wednesday, November 20, 2019 at 8:35:15 PM UTC-5, James wrote:
On 21/11/19 6:45 am, AMuzi wrote: On 11/20/2019 1:07 PM, 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? -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO Likely pads are not centered and parallel which is usually obvious on inspection. Review the setup directions for your brake. Start with the inner pad adjustment tight, center the caliper to the rotor, secure it and then do your final adjustment. Wouldn't they be hydraulic brakes? Yes, Shimano 105 flat mount calipers and Shimano hydraulic brake levers. The rotors is 160 mm. I agree with checking that the calipers are properly located on the mount so that the pads are aligned with the rotor, and I would think bleeding the brakes might help? Thanks, and thanks to Andrew Muzi as well. -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO |
#10
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Creeping brake pad drag
On Wednesday, November 20, 2019 at 6:02:18 PM UTC-8, 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 Another outside possibility is that the system is over-filled, so if all else fails, bleed it and refill it. And if all that doesn't work, buy a new caliper -- you could just have a bad one (there can be issues with seals and pistons). The notion that a hydraulic road disc will inevitably drag and make noise is wrong. I have hydraulic discs on three bikes, and they drag only when there is an issue. -- Jay Beattie. Remember that Joerge rides almost entirely off-road. My CX bike wore the pads out very rapidly. But it was my impression that this was because the pads were very shallow. After all, you could slip them in without pulling the mechanism apart. |
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