If any of you One Niner owners have purchased the frame with the Avid Juicy Seven brakes and American Classic wheels... can you tell me... does your front disc emit a very loud scream / squeel when you apply the brakes?

Thanks,


R.

It makes some friction noise and also shudders a bit up front when braking hard, but that could be my ti-fork flexing... No loud scream/squeel any more.

It made more noise the first few rides and also had much less power than it has now. It needs a bit of braking in, I don't think mine is quite ready yet actually.

It is my first disc brakes and I'm not totally convinced yet to be honest.

Maybe the tabs need facing? Or they could just need to get really hot on a long dh run. My Hopes never really worked that good untill I did some chairlift runs and got them good and hot.

Could also be that common Juicy problem. I believe the cause is the rotors, do a search(if the search feature works), you sohlud find alot about it.

Maybe the tabs need facing? Or they could just need to get really hot on a long dh run. My Hopes never really worked that good untill I did some chairlift runs and got them good and hot.

A few good mud runs always helped to break in my brakes....

I did a search and also changed the Avid rotor to a Hayes plain round rotor.

I can't give the brakes a good long downhill run, as every man and his dog comes running out of their houses to see what the incredible noise is about.. :(

I'm getting some Galfer pads to try and quiet this beast down.

R.

The Avid rotors are noisy. I replaced the stock rotors on another bike with Hayes rotors and it quieted them right up. I'm gonna give the Avids on my Niner a little more time. They have quieted up some. My Lbs guy said to mix up a little bit of very fine mud and spread it on the rotors.It is supposed to cut the break in time down. It worked pretty well. You could always heat them up with a lighter and sand them lightly with 800 or 900 grit sandpaper.

not on a Niner but I can tell you horrible my friend's Juicy sound....even had the rotors dremeled throughout etc....still a huge annoyance. i think new round rotor helped though. not as huge a reported problem as with juicy's, other wavy rotors have similar problems at times given contact patch configuration with pads (ie, more stuff/angles of rotor to "catch" on pads)

If any of you One Niner owners have purchased the frame with the Avid Juicy Seven brakes and American Classic wheels... can you tell me... does your front disc emit a very loud scream / squeel when you apply the brakes?

Thanks,


R.A few tips I have used to cure brake noise:

You can try to re-align the caliper and rotor. Loosen the bolts (so the CPS washers rattle)and re-tighten them slowly while holding the brake lever closed. Also release the brake pressure and pump the brakes as you slowly tighten the bolts.

Very important! Check the bearings on your AC wheels. They will loosen during the first few rides as the bearings and seals "bed" in. Pick up your front wheel and see if there is any side to side play.

Make sure the front skewer is on really tight and the wheel is seated well in the dropouts. Make sure the hub axle or drop out does not have a "burr" or something that prevents the wheel from falling in the same place each time.

Also as reccomended by others, throwing some fine dirt on the rotors and do some heavy braking will help "bed" in the brakes.

You should not have to "face" the fork b/c the Avid has their CPS alignment that will compensate for this.

Mine squealed like little piggies at first, but I rode them with a little tension on the lever to help burn-in. This allowed the pads to rub and cause friction, but not enough to slow me down much. My back one feels like the pads are not alligned and the pad is getting squeezed between the wavy parts of the disc. There's a pulsating that feels like it could be shaving pad off. Do you keep your bike inside or out? Keeping the bike inside could cause a little condensation on the braking surface, resulting in squeal. When I used to keep my v-brake bikes inside I'd usually get a little noise as soon as I left, but it would always go away.

Anyone have issues with keeping the EBB tight?

bike squeal from time to time. Bark sometimes too. I got a tip to wipe the rotors using a clean rag dampened with isopropyl alcohol. I also learned not to wash the rotor dust out of the pads. They last longer when not cleaned out.

It works for me.

Cheap and easy.

Thanks everyone.. :)

I guess that I will give the brakes more time to 'bed in' and try the tips given.

It was funny... late yesterday afternoon.. I was riding the Niner around my home suburb sorting out things like handlebar / controls / seat / etc..

A lady was walking two little 'yappy' type dogs and crossed in front of me without looking.

I slammed on the front brake, it emitted a very LOUD shriek, the dogs leapt up into the air, she screamed... lol :)

Also.. I was riding down a long steep hill through a shopping mall with the front brake lightly on, to help bed in the pads.. The brake was wailing and screaming loudly. People were stopping and staring at me to see what the horrible noise was.. :)

It makes some dogs howl as I ride by.. :)

It looks like my "stealth" riding days are over... at least until the brake quiets down.


R.

Rainman......it sounds like you actually LIKE the attention :) dont fix it!!!!

If any of you One Niner owners have purchased the frame with the Avid Juicy Seven brakes and American Classic wheels... can you tell me... does your front disc emit a very loud scream / squeel when you apply the brakes?

Thanks,


R.

Madre's Juicy 7's have been quiet as a church mouse. She's experienced some of the pulsating/shudder, but standard avid rotors solve that.

Rainman......it sounds like you actually LIKE the attention :) dont fix it!!!!

....LOL ... :)

NO way mate, my thing is to flit by like a ghost, silent and almost unseen.. :) although I must say that it is now much harder to do on a bright orange framed One Niner..:)

Seriously, I want to get this damn brake noise fixed, it is driving me crazy.. a quiet ride in the bush is now impossible.. :(

R.

After having this occur on quite a few bikes and trying many ways of fixing the noise, including facing the tabs, sanding rotors, changing rotors to different types the one thing I have found to consistantly get rid of the noise is to fit non standard pads. I have used the EBC Greens with excellent results and they still hold up very well and also Fibrax. I did try a set of semi mettalic EBC Golds and the noise continued.

Swap the pads for a quiet ride. I have found that it doesn't always occur eg, My X5 only squelled in the rear, but my Salty has it in the fron not the rear, so I simply swap out the offending set.

Thanks Ventana, I tried to get those green pads, but have had no luck so far in finding a set.

I ordered a set of Galfer pads to try though. If they don't work, i'll try to get the EBC greens.


R.

It makes some dogs howl as I ride by.
Haw haw!

Haw haw!

.........."laugh it up, fuzzball" [Han Solo to Chewbacca, Starwars.]


Yeah, it is funny..I know. :)

At least everyone jumps out of the way now when I hit the front brake.. lol.. :)


R.

My first real ride on the bike was a beast so I think I broke them in right away. No squealing, but definite shudder on the rear. Used the Avid clean sweep rotors and this goes away. I feel the shudder but it doesn't seem to affect performance and only minimal noise. Get out and get them dirty!

My first real ride on the bike was a beast so I think I broke them in right away. No squealing, but definite shudder on the rear. Used the Avid clean sweep rotors and this goes away. I feel the shudder but it doesn't seem to affect performance and only minimal noise. Get out and get them dirty!
I was just in Tahoe for 4 days riding and testing some new frames. If you are having shuttering in the rear, re-align your caliper. It should go away. A buddy and my bike were both doing it the first day. I stopped trailside and re-did them and wala! no shutter. Also check your rear wheel and see if there is play in the hub, another big cause of shutter.

Thanks Chris... I checked the front wheel bearings today, no play yet. I also re-adjusted the wheel in the forks, and re-adjusted the caliper...all to no avail. I re-cleaned the rotor, and removed the pads and cleaned / sanded them...still they scream like a banshee after a little bit of riding..

So............. I have emailed SRAM and asked them what to do about it. Hopefully they will send me another set of pads and another rotor...or a magic wand. :)

I also got a set of Galfer pads from a LBS to try out.

One thing I can say though...this bike is soooooo fast !! Once you get it spinning and up to cruising speed, it rolls over everything...it's an amazing machine.. :)


R.

It's been a long day here at Rainman Repairs.

I finally tracked down the cause of the squeeling front disc..or I think I have.. :)

First up, I fitted a set of Galfer replacement pads to the Avids and tried them out... and they worked. No horrible squeel after a short bedding in, just an occasional squawk... lol.

Then, I had another look at the original Avid disc pads. I started wondering whether they were contaminated with something like grease or oil.

I heated up the hotplate on "Her Indoors" stove, and "cooked" the pads. They smoked pretty well..:)

After they had cooled off, I lightly sanded them again, and replaced them in the calipers.

Guess what.....they worked.. :) Somehow, they had got impregnated with something like oil or grease I guess, and that was causing the squeels...I think.

Of course, I am not 100% sure about this, but there was definitely some smoke when I cooked them, and in the past when I have done this to other pads, it indicated some foreign substance present.

Anyways, as I said, it worked. The Avid pads are now quiet. Hooray!!

Now all I have to deal with is the "pulsing" that comes from the wavey rotor.. :(

Just one last comment... I am in no way blaming anyone for this, especially Chris or Steve at Ninerbikes.

The chances are that the pads were contaminated by either me during assembly or were like that from the factory.. I don't know for sure, and will probably never know...I don't really care either.. :) just so long as we have peace.. :)

Now all I need is for SRAM to send me a new round disc to get rid of these 'pulses'.

Thanks to everyone for the help and input. I'm in "stealth mode" again.. :)


R.

It's been a long day here at Rainman Repairs.

I finally tracked down the cause of the squeeling front disc..or I think I have.. :)

First up, I fitted a set of Galfer replacement pads to the Avids and tried them out... and they worked. No horrible squeel after a short bedding in, just an occasional squawk... lol.

Then, I had another look at the original Avid disc pads. I started wondering whether they were contaminated with something like grease or oil.

I heated up the hotplate on "Her Indoors" stove, and "cooked" the pads. They smoked pretty well..:)

After they had cooled off, I lightly sanded them again, and replaced them in the calipers.

Guess what.....they worked.. :) Somehow, they had got impregnated with something like oil or grease I guess, and that was causing the squeels...I think.

Of course, I am not 100% sure about this, but there was definitely some smoke when I cooked them, and in the past when I have done this to other pads, it indicated some foreign substance present.

Anyways, as I said, it worked. The Avid pads are now quiet. Hooray!!

Now all I have to deal with is the "pulsing" that comes from the wavey rotor.. :(

Just one last comment... I am in no way blaming anyone for this, especially Chris or Steve at Ninerbikes.

The chances are that the pads were contaminated by either me during assembly or were like that from the factory.. I don't know for sure, and will probably never know...I don't really care either.. :) just so long as we have peace.. :)

Now all I need is for SRAM to send me a new round disc to get rid of these 'pulses'.

Thanks to everyone for the help and input. I'm in "stealth mode" again.. :)


R.
maybe "something else" got on the pads when you were so excited about your new bike

You should try to add a little BBQ sauce the next time, it will make you hungry on your next downhill ride :)

...Now all I have to deal with is the "pulsing" that comes from the wavey rotor.. :( ...
For what it's worth, the Galfer Wavey rotors work great with the Avid Mech brakes. I have them on several bikes and they are generally quiet and do not pulse. I seem to get longer pad life than with the round Avid rotors, too.

You should try to add a little BBQ sauce the next time, it will make you hungry on your next downhill ride :)

BBQ sauce..geez, that's a good idea. :)


R.

maybe "something else" got on the pads when you were so excited about your new bike

Naah Fo, i'm too old for that to happen any more, mate. I use string and a balloon for my once-a-year horizontal folkdance with "She Who Must Be Obeyed". :)


R.

For what it's worth, the Galfer Wavey rotors work great with the Avid Mech brakes. I have them on several bikes and they are generally quiet and do not pulse. I seem to get longer pad life than with the round Avid rotors, too.

Thanks Shiggy. I'll look into it.

R.