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 08-22-08, 10:01 AM   #1
ochizon
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes:
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Front derailer stand off issue - cant fit tires

Ok, I am having what I suppose is a unique issue. I have a gary fisher KaiTai hybrid, and bought some 29er tires for it for some light trail riding. Well, everything fit, except for the front derailer. The Derailer is a Shimano C101 derailer, top pull type. The actuating body of the derailer stands off roughly 1 1/4" from the back of the seat tube, and the tire is just slightly rubbing it. I am wondering if there are any shimano top pull type derailers that have a smaller standoff, or maybe have the bulk of the actuator to the side? Maybe a road front derailer??? Just trying to see if there is any option.

Thanks!
ochizon is offline   Reply With Quote
Old 08-22-08, 10:23 AM   #2
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 95 Post(s)
Your situation isn't unique. I have a '96 Litespeed road bike with an 8-speed 105 triple drivetrain. The actuating arm of the front derailleur would hit the rear tire when in the big chainring. I was using a braze-on 105 triple fd with a Shimano 1-3/8" (35 mm) adapter clamp which put the fd rather far back. Switching to a band-on fd solved the problem as the mechanism is further forward.

The newer 9-speed road fd's have shorter actuating arms and clear everthing just fine.
HillRider is offline   Reply With Quote
Old 08-22-08, 10:27 AM   #3
maddmaxx 
Small Member
 
maddmaxx's Avatar
 
Join Date: Nov 2003
Bikes: Leader home built hardtail, Diamondback Response
Posts: 7,136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 393 Post(s)
Road front derailleurs are almost universally bottom pull however. You can do this but you may have to install a turnaround pully at the bottom the the seat tube just above the BB.
__________________
Liberal bias makes it's own facts.
maddmaxx is offline   Reply With Quote
Old 08-22-08, 02:56 PM   #4
ochizon
Senior Member
Thread Starter
 
Join Date: Jul 2008
Bikes:
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is Anyone familiar with this type of derailer?




http://www.blueskycycling.com/produc...High-Mount.htm


It looks as though its actuator is off to the side, rather than standing off of the back like mine.
ochizon is offline   Reply With Quote
Old 08-22-08, 03:18 PM   #5
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 95 Post(s)
One question; how wide are the 29" tires you bought? Most hybrid bikes are expected to use 700x35 or 700x38 tires. If you bought 2" or larger 29" tires (700x50 or more) you are going to have a tough time clearing them with any front derailleur.
HillRider is offline   Reply With Quote
Old 08-22-08, 03:40 PM   #6
maddmaxx 
Small Member
 
maddmaxx's Avatar
 
Join Date: Nov 2003
Bikes: Leader home built hardtail, Diamondback Response
Posts: 7,136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 393 Post(s)
Quote:
Originally Posted by ochizon View Post
Is Anyone familiar with this type of derailer?




http://www.blueskycycling.com/produc...High-Mount.htm


It looks as though its actuator is off to the side, rather than standing off of the back like mine.
The current model is a dual pull version that looks very similar to this but with an inner pull arm on the inside of the pivot that would still be a problem for you. This one could work for you without that arm. The inside edge of the pivot (what you see in the picture just below the band clamp) is almost flush (just a bit outside) with the outside edge of the seat tube. Hope that info helps.
__________________
Liberal bias makes it's own facts.
maddmaxx 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 12:16 AM.