Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-19-05, 12:47 PM   #1
georgebest
Junior Member
Thread Starter
 
Join Date: Apr 2005
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hope problem???

Hi Chaps

I've just bought a Rockhopper & purchased some Mono Minis seperately which the shop fitted (on to the Manitou Elites?).

I've got it home & when I peddle with any power & the bike is tilted to the right (disc is on the left), there's quite a loud 'pringing' sound. Something is rubbing but what I know about bikes isn't worth knowing!
Has anyone got any ideas that may help?
Cheers
georgebest is offline   Reply With Quote
Old 05-19-05, 12:55 PM   #2
dirtbikedude
Gravity Is Yer Friend
 
dirtbikedude's Avatar
 
Join Date: May 2002
Location: "Over the Hill" and going down fast in the 805.
Bikes: Scott Gambler, Scott Ransom, Kona Bear, Bianchi 928 Carbon/Chorus, C'Dale Rize4
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If they did not set the caliper up just right you are probably hearing the disc hit the caliper because of a small amount of flex in the fork. When the front is unsupported can you spin the wheel with no problems?
dirtbikedude is offline   Reply With Quote
Old 05-19-05, 01:02 PM   #3
georgebest
Junior Member
Thread Starter
 
Join Date: Apr 2005
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah

When I spin the bike over, the wheel spins ok (a tiny bit of friction between the disc & pad). It's when I peddle hard & the bike is angled to my right that there's quite a lound ringing sound? It doesn't sound heathly but I couldn't spot any major signs of friction?
georgebest is offline   Reply With Quote
Old 05-19-05, 01:07 PM   #4
dirtbikedude
Gravity Is Yer Friend
 
dirtbikedude's Avatar
 
Join Date: May 2002
Location: "Over the Hill" and going down fast in the 805.
Bikes: Scott Gambler, Scott Ransom, Kona Bear, Bianchi 928 Carbon/Chorus, C'Dale Rize4
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I know the sound. Look closely at where the disc passes through the caliper. If it is at even the smallest angle or a mm or two to one side it can cause this to happen. Hopes are great brakes, that is all i use but they are a biyatch to set up at times.

Are you a clydesdale rider (200+lbs)? That will also increase how much the fork will flex
dirtbikedude is offline   Reply With Quote
Old 05-19-05, 01:09 PM   #5
dirtbikedude
Gravity Is Yer Friend
 
dirtbikedude's Avatar
 
Join Date: May 2002
Location: "Over the Hill" and going down fast in the 805.
Bikes: Scott Gambler, Scott Ransom, Kona Bear, Bianchi 928 Carbon/Chorus, C'Dale Rize4
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Might seem silly to ask but did you make sure the qr is snug and that the wheel is in the dropouts stright?

dirtbikedude is offline   Reply With Quote
Old 05-19-05, 01:16 PM   #6
georgebest
Junior Member
Thread Starter
 
Join Date: Apr 2005
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Nah, I'm a between 11 & 12 stone (160ish pounds?). It's just a bit annoying because the bike shop gave me their spiel that I needed the brakes fitting by them, & they'd do an A1 job etc....
Do you reckon I need to take it back in?
georgebest is offline   Reply With Quote
Old 05-19-05, 01:21 PM   #7
georgebest
Junior Member
Thread Starter
 
Join Date: Apr 2005
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah, I think so (QR + straight).... I pulled the wheel off & put it back on
georgebest is offline   Reply With Quote
Old 05-19-05, 01:25 PM   #8
dirtbikedude
Gravity Is Yer Friend
 
dirtbikedude's Avatar
 
Join Date: May 2002
Location: "Over the Hill" and going down fast in the 805.
Bikes: Scott Gambler, Scott Ransom, Kona Bear, Bianchi 928 Carbon/Chorus, C'Dale Rize4
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I would say yes. If you tell the shop the caliper is not on stright and they see it is only off a very very tiny amount they might just think you are just an anal arse (depends on the shop though). So just tell them the problem, see what they say and if they can correct it. You should be able to recreate the sound riding in the parking lot to show them what you are talking about.

Also, if you have a very stong legs then you could just be flexing the fork alot.
dirtbikedude is offline   Reply With Quote
Old 05-19-05, 01:30 PM   #9
georgebest
Junior Member
Thread Starter
 
Join Date: Apr 2005
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It must be the legs!!

Good stuff. Thanks for the advice
georgebest is offline   Reply With Quote
Old 05-19-05, 01:30 PM   #10
dirtbikedude
Gravity Is Yer Friend
 
dirtbikedude's Avatar
 
Join Date: May 2002
Location: "Over the Hill" and going down fast in the 805.
Bikes: Scott Gambler, Scott Ransom, Kona Bear, Bianchi 928 Carbon/Chorus, C'Dale Rize4
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Just another thought, before you ride again make sure the bolts on the disc are tight. That is another cause and can put you in the emergency room quite quickly

dirtbikedude is offline   Reply With Quote
Old 05-20-05, 01:29 AM   #11
stapfam
Time for a change.
 
stapfam's Avatar
 
Join Date: Jan 2004
Location: 6 miles inland from the coast of Sussex, in the South East of England
Bikes: Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.
Posts: 19,915
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by dirtbikedude
Just another thought, before you ride again make sure the bolts on the disc are tight. That is another cause and can put you in the emergency room quite quickly

I have Hope Mono M4's and they do take some setting up. Make certain that all the bolts are tight. Even go as far as putting threadlock on the bolts. All bolts tight,Centred correctly, Still Getting the sound, then perhaps the Caliper is not far enough out from the Discs,

Too many options to go through on where the noise is coming from so take it back.
stapfam is offline   Reply With Quote
Old 05-21-05, 01:36 AM   #12
Hopper
Ride bike or bike ride?
 
Hopper's Avatar
 
Join Date: Oct 2003
Location: Adelaide, Australia
Bikes: MongoosePro DH, Dart custom road bike, .243 Racing FR street bike
Posts: 1,447
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok either the caliper is a little bit offset, it is possible that there are a few burs on the fork mount or caliper spacer which could be doing this. Also it is quite likely that somethig is flexing, your hub, your fork, your skewers, your rotor even (but very unlikely). When you put the bike on an angle there are gyroscopic forces trying to push you upright, these forces will cause some very minor flex in your bike and even the smallest amount of flex can cause a rotor to rub.
Hopper is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:14 AM.