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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-31-04, 02:40 AM   #1
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Replace lousy rear canti brake

My rear canti brake is located under the chain stay, sort of like some BMX brakes. Both front and rear have been very difficult to keep in adjustment and finally broke. The front is easy to replace, but the rear brake is weird to me. as it is huge compaired to most cantilevers. Any suggestions, short of brazeing on a new boss where it belongs (not out of the question)?
rlong is offline   Reply With Quote
Old 12-31-04, 02:43 AM   #2
XzEn54321
Now with suspension!
 
XzEn54321's Avatar
 
Join Date: Aug 2004
Location: Mill Valey, CA
Bikes: '04 Giant XTC-2, '96 hardrock sport
Posts: 192
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Just get a new set, center pulls anr really cheap.
XzEn54321 is offline   Reply With Quote
Old 12-31-04, 03:00 AM   #3
Raiyn
I drink your MILKSHAKE
 
Raiyn's Avatar
 
Join Date: Jul 2002
Location: St. Petersburg, FL
Bikes: 2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
Posts: 15,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by rlong
My rear canti brake is located under the chain stay, sort of like some BMX brakes. Both front and rear have been very difficult to keep in adjustment and finally broke. The front is easy to replace, but the rear brake is weird to me. as it is huge compaired to most cantilevers. Any suggestions, short of brazeing on a new boss where it belongs (not out of the question)?
It sounds like a early 90's / late 80's Specialized with those damned U brakes. You're pretty well hosed as far as replacing one of those with anything better.
__________________
Raiyn is offline   Reply With Quote
Old 12-31-04, 10:22 AM   #4
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Bikes: Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Posts: 17,833
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 82 Post(s)
Quote:
Originally Posted by Raiyn
It sounds like a early 90's / late 80's Specialized with those damned U brakes. You're pretty well hosed as far as replacing one of those with anything better.
Yep! It sounds like a U-brake. U-brakes weren't just on Specialized but on all kinds of mountain bikes throughout the early 90's. The bad news is that you can't replace them with any thing else since the bosses are in the wrong spot for canti's or V-brakes. The good news is that they are still used, somewhat by the BMX crowd. Check here http://www.americancycle.com/cart.cg...evers_hardware or at Airbomb (click on any of the categories). Good luck.

Stuart Black
cyccommute is offline   Reply With Quote
Old 12-31-04, 11:24 AM   #5
mtbikerinpa
Senior Member
 
mtbikerinpa's Avatar
 
Join Date: Dec 2004
Location: PA
Bikes: 92 Giant Sedona ATX Custom
Posts: 1,713
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yep, BMX guys like the feet clearance. If you got a good set then they can be decent.
That said, I converted my cromoly Sedona frame to Disc from standard canti. On cromo it was just a matter of getting a plate of steel and shaping it and drilling it. I had a friend mig-weld it on and its been soo much better. If its aluminum, well... thats a little trickier but still doable.
mtbikerinpa is offline   Reply With Quote
Old 01-02-05, 11:25 PM   #6
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes it was about 1985 and it's a KHS bike. Really more of a tour bike if you ask me. But back then, just about anything could be called a mountain bike. The brake arms are very long and I'm certain my son (a wrench) said they were BMX brakes.
thanks
rlong is offline   Reply With Quote
Old 01-02-05, 11:26 PM   #7
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks everyone. The idea of converting to disk is tempting, but naaa.
rlong is offline   Reply With Quote
Old 01-03-05, 10:17 PM   #8
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I looked at the BMX site and it appears to resemble a U-brake. I did find (in very small print), BF Suntour stamped on the bottom of both arms. I never noticed it before.
rlong is offline   Reply With Quote
Old 01-03-05, 11:07 PM   #9
mtbikerinpa
Senior Member
 
mtbikerinpa's Avatar
 
Join Date: Dec 2004
Location: PA
Bikes: 92 Giant Sedona ATX Custom
Posts: 1,713
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If its SunTour then there is some collector value if anything.
mtbikerinpa is offline   Reply With Quote
Old 01-03-05, 11:59 PM   #10
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
OK, here it is; I found them on-line. They are Suntour XC Power Brakes CB6000, rollercam design, licensed from WTB Cunningham "the popular XC powercam brakes." They sucked when they were new and they suck even more with broken adjustment springs. It says they cannot be replaced with standard canti's. The pivot is in the middle, shoe at the bottom and levers at the top with a cam plate separating them and attached to the brake cable.

I think I may have to braze a set of canti posts on to replace these things.
rlong is offline   Reply With Quote
Old 01-04-05, 12:59 AM   #11
seely
The Rabbi
 
seely's Avatar
 
Join Date: Apr 2004
Bikes:
Posts: 5,085
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by rlong
licensed from WTB Cunningham "the popular XC powercam brakes." They sucked when they were new and they suck even more with broken adjustment springs.
Tangent:

I will never understand why Cunningham is exalted as the god of MTB when he gave us chainstay mounted crappy U-brakes, and elevated stays... two of the stupidest designs in the history of mountain biking.
seely is offline   Reply With Quote
Old 01-16-05, 02:25 AM   #12
rlong
Senior Member
Thread Starter
 
Join Date: Nov 2004
Bikes:
Posts: 303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Found nearly new Shimano Deore XT for front, and some weird thing for the back; the arms cross over and pull from center very strong. Problem solved.
rlong 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 10:59 AM.