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Well...
My rear brake hasn't been working well over the last few weeks... So I used some Isopropyl alcohol on the disc to clean it, loads of black stuff came off...
So I rode the bike down the street, braked and there is a huge vibration coming from the back... So huge my feet and knees felt numb while braking!
WTF is going on!?
Bike in question...
[url= http://farm7.staticflickr.com/6023/6008195242_2e743e59fb.jp g" target="_blank">
[url= http://www.flickr.com/photos/milkiekula/6008195242/ ]My Mountain Bike[/url] by [url= http://www.flickr.com/people/milkiekula/ ]MilkieKula[/url], on Flickr
180mm Rear Disc, Avid Juicy 7's..
Yes I know, ditch the Juicy's and replace 180mm with 160mm.. 160mm will be going on tonight.. Anymore sensible options!?
BTW I've got to sort this for tomorrow... Going to see Jedi! 😆
...lastminute.com !
Is the caliper tight to its mount and is/are the bolts tight on the rotor?
Checked all bolts, all nice n tight.
Does it have spacers on the bolts that hold it to the frame? They are normally in pairs, one convex and one concave. On my Elixirs I have this setup and I managed to fix the vibration by changing the spacers. The spacers are exactly the same as the one on V-brak blocks.
You have left some of the deposits on the disc unevenly. sand the disc gently to get a deposit free surface and bed the pads in again
I had similar on my 456. The vibrations were awful on road but I never noticed off road as there was more vibrations/bumps from the ground. Mine were BB7's and it went when I changed brakes to Hopes so maybe jonba has the answer up there ^^
Avid
I've seen this a few times, only option is to get rid and get Shimano or Hope.
Jonba, I didn't try that, I'll try jiggling the self levelling spacers? and re-align the disc.
I've got away with it, by fitting a new 180mm rear disc and bedding the pads back in... It doesn't stop as well, but at least it doesn't vibrate and sound like like a fog horn..
At least this gets me out of the shit for tomorrow! 😀
I will be changing my brakes for something that requires less maintenance... Hayes 9's worked fine, why did I change them to Juicys!??