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danose
Mangled
Joined: May 27, 2004
Posts: 10,986
Location: Nose City
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 Posted: Mon 22/Sep/08 10:59am Post subject: RE: Brake Shudder |
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| stuart_rv wrote: | Help please. I recently brought some new Vesrah pads for my BB7's, which was all good until they started to shudder when under load  I didn't have a problem with the stock Avid pads, which made me think I may have installed the new ones incorrectly, so I reset them but to no avail.
Any help on how to remedy this would be great. Cheers |
had that with vesrahs in BB7s - if you look at the wear on the rotors you'll notice the pads actually run slightly up onto the rotor arms, pulsing is those arms passing the pads. You can actually feel it on the stock avid sintered pads - just much less noticable (presumably cos the vesrahs are more agressive so bite harder). Try a washer under the cps mounts to raise the calliper 1-2mm
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grahamt
Worn
Joined: Oct 11, 2004
Posts: 726
Location: upright
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| Posted: Mon 22/Sep/08 11:06am Post subject: RE: Re: Brake Shudder |
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| danose wrote: | | stuart_rv wrote: | Help please. I recently brought some new Vesrah pads for my BB7's, which was all good until they started to shudder when under load I didn't have a problem with the stock Avid pads, which made me think I may have installed the new ones incorrectly, so I reset them but to no avail.
Any help on how to remedy this would be great. Cheers |
had that with vesrahs in BB7s - if you look at the wear on the rotors you'll notice the pads actually run slightly up onto the rotor arms, pulsing is those arms passing the pads. You can actually feel it on the stock avid sintered pads - just much less noticable (presumably cos the vesrahs are more agressive so bite harder). Try a washer under the cps mounts to raise the calliper 1-2mm |
Did that on my old Juicys - worked a treat
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TonyT1961
Scuffed
Joined: Aug 23, 2007
Posts: 261
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| Posted: Mon 22/Sep/08 11:29am Post subject: RE: Re: Brake Shudder |
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| danose wrote: | | stuart_rv wrote: | Help please. I recently brought some new Vesrah pads for my BB7's, which was all good until they started to shudder when under load I didn't have a problem with the stock Avid pads, which made me think I may have installed the new ones incorrectly, so I reset them but to no avail.
Any help on how to remedy this would be great. Cheers |
had that with vesrahs in BB7s - if you look at the wear on the rotors you'll notice the pads actually run slightly up onto the rotor arms, pulsing is those arms passing the pads. You can actually feel it on the stock avid sintered pads - just much less noticable (presumably cos the vesrahs are more agressive so bite harder). Try a washer under the cps mounts to raise the calliper 1-2mm |
As usual, a fountain of knowledge, Danose, thanks
Sorry to butt in on your thread Stuart, but I was going to post a similar thread before I saw yours.
Cheers
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stuart_rv
Dusty
Joined: Jul 23, 2007
Posts: 89
Location: Lagging behind
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| Posted: Mon 22/Sep/08 11:57am Post subject: |
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Cheers Danose thats awsome. TonyT no worries, its good to know I'm not the only one with dodgy brakes.
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danose
Mangled
Joined: May 27, 2004
Posts: 10,986
Location: Nose City
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| Posted: Mon 22/Sep/08 12:00pm Post subject: RE: Re: Re: Brake Shudder |
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| TonyT1961 wrote: | | danose wrote: | | stuart_rv wrote: | Help please. I recently brought some new Vesrah pads for my BB7's, which was all good until they started to shudder when under load I didn't have a problem with the stock Avid pads, which made me think I may have installed the new ones incorrectly, so I reset them but to no avail.
Any help on how to remedy this would be great. Cheers |
had that with vesrahs in BB7s - if you look at the wear on the rotors you'll notice the pads actually run slightly up onto the rotor arms, pulsing is those arms passing the pads. You can actually feel it on the stock avid sintered pads - just much less noticable (presumably cos the vesrahs are more agressive so bite harder). Try a washer under the cps mounts to raise the calliper 1-2mm |
As usual, a fountain of knowledge, Danose, thanks
Sorry to butt in on your thread Stuart, but I was going to post a similar thread before I saw yours.
Cheers |
credit where credit's due - it was actually Percy who put me on to that fix 
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RussS
Ridden
Joined: Aug 11, 2006
Posts: 164
Location: Hamilton, NZ
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| Posted: Mon 22/Sep/08 12:06pm Post subject: |
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Yup - raising the calipers a gnats whisker usually alleviates the problem. Me, I went away from the wavy rotors and found braking to be more consistant.
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danose
Mangled
Joined: May 27, 2004
Posts: 10,986
Location: Nose City
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| Posted: Mon 22/Sep/08 12:08pm Post subject: |
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| RussS wrote: | | Yup - raising the calipers a gnats whisker usually alleviates the problem. Me, I went away from the wavy rotors and found braking to be more consistant. |
I still notice pulsing (if I look for it) even on my old cleansweeep rotors (with avid pads) on the commuter (again with bb7s) - same reason, pads are deeper than the brake track
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konaking
Flogged
Joined: May 28, 2006
Posts: 2,451
Location: Northshore Auckland
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| Posted: Mon 22/Sep/08 12:09pm Post subject: |
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every avid brake ive seen has washers
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danose
Mangled
Joined: May 27, 2004
Posts: 10,986
Location: Nose City
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| Posted: Mon 22/Sep/08 12:12pm Post subject: |
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| konaking wrote: | | every avid brake ive seen has washers |
those are the cps washers - we're talking about ADDING an extra 1-2mm of plain washers to raise the caliper relative to the brake track
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konaking
Flogged
Joined: May 28, 2006
Posts: 2,451
Location: Northshore Auckland
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| Posted: Mon 22/Sep/08 12:16pm Post subject: |
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yes but do u see washers on shimano
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iwanttobeatyouwithmymouse
Shiny
Joined: Sep 10, 2008
Posts: 21
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| Posted: Mon 22/Sep/08 12:27pm Post subject: |
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| konaking wrote: | | yes but do u see washers on shimano |
thats cos shimano know what they are on to with their brakes.
hence the posts saying to buy them. i have shimano DXR v brakes on my haro bmx racer, and i'd put money on them working better than a normal bb5 or deore cable disc.
so really, just go buy a bmx for the same price as a new set of good brakes.
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iwanttobeatyouwithmymouse
Shiny
Joined: Sep 10, 2008
Posts: 21
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| Posted: Mon 22/Sep/08 12:29pm Post subject: |
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... and now the "buy a bmx" jokes come out...
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danose
Mangled
Joined: May 27, 2004
Posts: 10,986
Location: Nose City
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| Posted: Mon 22/Sep/08 12:35pm Post subject: |
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| iwanttobeatyouwithmymouse wrote: | | konaking wrote: | | yes but do u see washers on shimano |
thats cos shimano know what they are on to with their brakes.
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ahh - I love it when a thread is invaded by clueless groms 
avid's cps system is a great idea - anyone who's battled conventional post mount brakes (hayes, shimano etc) on a slightly out-of-spec frame/fork knows that. Of course if you're a grom who can't read the instructions on how to set them up correctly all bets are off...
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iwanttobeatyouwithmymouse
Shiny
Joined: Sep 10, 2008
Posts: 21
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| Posted: Mon 22/Sep/08 1:00pm Post subject: |
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| danose wrote: | | iwanttobeatyouwithmymouse wrote: | | konaking wrote: | | yes but do u see washers on shimano |
thats cos shimano know what they are on to with their brakes.
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ahh - I love it when a thread is invaded by clueless groms
avid's cps system is a great idea - anyone who's battled conventional post mount brakes (hayes, shimano etc) on a slightly out-of-spec frame/fork knows that. Of course if you're a grom who can't read the instructions on how to set them up correctly all bets are off... |
you obviously havent ridden a bike with dxr's before have you...
poor boy...
sure, all bets off if i ride through a 20" puddle and drench my rim and callipers, but what sort of person is stupid enough to do that any way.
p.s. ive forgotten something... remind me how it feels when you hafta pay soooooo much for a tiny pad when i'm gettin mine for next to nothing and they're lasting longer please?
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iwanttobeatyouwithmymouse
Shiny
Joined: Sep 10, 2008
Posts: 21
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| Posted: Mon 22/Sep/08 1:01pm Post subject: |
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and i think my number plate on the front with the NZ #2 contradicts your 'grom' remark.
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