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 06-14-10, 11:16 AM   #1
tyo515
Newbie
Thread Starter
 
Join Date: Jun 2010
Bikes:
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
basic question- front tire alignment

I have a Trek Pilot 1.0 and my front brake is rubbing on the wheel. I'm sure it's just a simple matter of tightening up, I'm not sure how/where to tighten the mechanism itself, or if it's something I should have looked at in a shop?
Clearly I know little about my bike. Any help is greatly appreciated!
tyo515 is offline   Reply With Quote
Old 06-14-10, 11:23 AM   #2
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Bikes: Bottecchia Sprint
Posts: 14,203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 131 Post(s)
I'm not familiar with that exact bike but there is probably an adjusting screw on the cable housing and turning it in one direction will lesson the tension and open the caliper a bit.
rumrunn6 is offline   Reply With Quote
Old 06-14-10, 11:26 AM   #3
tyo515
Newbie
Thread Starter
 
Join Date: Jun 2010
Bikes:
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I did that, and it did indeed open it, but the right brake pad is still sitting right on the rim. It seems like I should be tightening the entire unit to the frame itself, but I'm not sure if I'm about to over-adjust something, or if I should be looking where my wheel is more than where the braking unit it.
tyo515 is offline   Reply With Quote
Old 06-14-10, 11:33 AM   #4
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by tyo515 View Post
I did that, and it did indeed open it, but the right brake pad is still sitting right on the rim. It seems like I should be tightening the entire unit to the frame itself, but I'm not sure if I'm about to over-adjust something, or if I should be looking where my wheel is more than where the braking unit it.
I suggest you bring this into a shop and show them the problem given your current lack of knowledge.
operator is offline   Reply With Quote
Old 06-14-10, 11:46 AM   #5
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Bikes: Bottecchia Sprint
Posts: 14,203
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 131 Post(s)
then you need to align the unit (rotate left or right). folks here can help you with that. can you post a picture of the unit so we can see what it looks like? you might have to loosen a nut align the unit and then tighten that nut again (where it attaches to the frame)
rumrunn6 is offline   Reply With Quote
Old 06-14-10, 12:21 PM   #6
BCRider
Senior Member
 
BCRider's Avatar
 
Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
Posts: 5,456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Check out the self help section on brakes at www.parktool.com/repair . Hover your mouse over the brake caliper on the bike and click. Find your type of brakes in the next page and then read and learn.

You're welcome....
BCRider is offline   Reply With Quote
Old 06-14-10, 01:49 PM   #7
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,277
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 35 Post(s)
+1 - Several steps involved, easier to follow a guide like the Park site than one-by-one posts. Wheel needs to be centered between fork blades before you start anything of course.
cny-bikeman is offline   Reply With Quote
Old 06-14-10, 01:56 PM   #8
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The subject line refers to "tire alignment". Is the wheel rim centered in the fork? It should be.
Al1943 is offline   Reply With Quote
Old 06-14-10, 02:09 PM   #9
BCRider
Senior Member
 
BCRider's Avatar
 
Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
Posts: 5,456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Lots of bikes are running around with front wheels that are dished slightly off so they don't run exactly centered. But that's a good point. If the front was out a little and then it was installed flopped the other way then the pads would certainly rub then. Flipping the wheel around may just solve the issue... or at least return things to their original "compensated" arrangement

Another thought if the centering adjustment doesn't do the trick is that one arm of the brakes may have a broken return spring or the pin that the the return spring sits on is broken off or merely that the arm of the return spring slipped off the pin. Compare one side to the other to see if everything is the same. If not then fix whatever is the cause on the side that is busted or misplaced.
BCRider 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 11:29 AM.