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 12-28-06, 01:35 PM   #1
R.A.D.
Senior Member
Thread Starter
 
R.A.D.'s Avatar
 
Join Date: Nov 2006
Location: NYC
Bikes: '92 Trek 400
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano 105 front derailleur and 10 speed cassette question.

Let me first admit my amateur level when it comes to understanding bicycle mechanics. If I happen to say something stupid please forgive me.

I have a Cannondale R800 double with a 10 speed cassette with, Ultegra rear derailleur, and a 105 front derailleur.

No matter how much I adjust the front derailleur the chain always scrapes along the front derailleur either on the first gear or the tenth gear of the rear cassette. If I compensate for the first gear it scrapes on the tenth gear and vice versa.

When I did dome searching on the Shimano website I only see the 105 components working with a 9 speed cassette. My question is was the 105 front derailleur designed to work with a 10 speed cassette?

I should mention that the bike has all of the stock components, so I didn't think that non-compatible components would be installed, but I just can't seem to get it right.

Thanks for your help in advance.
R.A.D. is offline   Reply With Quote
Old 12-28-06, 02:22 PM   #2
joejack951
Senior Member
 
joejack951's Avatar
 
Join Date: May 2004
Location: Wilmington, DE
Bikes: 1984 Trek 660, 2003 Specialized Hardrock, 2004 LOOK KG386i, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2014 Islabikes CNOC 14 (son's)
Posts: 9,971
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 74 Post(s)
Depending on the length of your chain stays, you might be able to set up the front derailleur to not scrape the chain when using the middle ring and the full range of the cassette. On your R800, I doubt that is the case. In the little ring and big ring, you really shouldn't be cross chaining (using the inside ring up front and the outside cog in the back or vice versa) that much anyway so don't worry about a little rub in those gears. I've always been happy with a little rub in the small/small combo, at either end of the cassette when using the middle ring, and the big/big combo. The chain rub itself is more of an annoyance than a real concern anyway unless it's rubbing very badly in which case, the chain would be derailing (and that would be a much bigger issue).
joejack951 is offline   Reply With Quote
Old 12-28-06, 02:36 PM   #3
R.A.D.
Senior Member
Thread Starter
 
R.A.D.'s Avatar
 
Join Date: Nov 2006
Location: NYC
Bikes: '92 Trek 400
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by joejack951
Depending on the length of your chain stays, you might be able to set up the front derailleur to not scrape the chain when using the middle ring and the full range of the cassette. On your R800, I doubt that is the case. In the little ring and big ring, you really shouldn't be cross chaining (using the inside ring up front and the outside cog in the back or vice versa) that much anyway so don't worry about a little rub in those gears. I've always been happy with a little rub in the small/small combo, at either end of the cassette when using the middle ring, and the big/big combo. The chain rub itself is more of an annoyance than a real concern anyway unless it's rubbing very badly in which case, the chain would be derailing (and that would be a much bigger issue).
Thanks for the info! Yeah it only rubs slightly. Thanks for letting me know that slight rubbing is OK. I was afraid that it may be damaging the derailleur. I also spoke to someone at Cannondale who explained that there's a half click for the front derailleur that I didn't know was there for the 9th and 10th gear. That seems to help. I recently read that small/small or big/big should be avoided so thanks for reinforcing that. I'll avoid those combos or at least use them at a minimum in the future.
R.A.D. is offline   Reply With Quote
Old 12-28-06, 08:25 PM   #4
capwater
Senior Member
 
capwater's Avatar
 
Join Date: Dec 2004
Location: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
Posts: 1,509
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by R.A.D.
When I did dome searching on the Shimano website I only see the 105 components working with a 9 speed cassette. My question is was the 105 front derailleur designed to work with a 10 speed cassette?
Boosheet. 105 is 10 speed now, in fact you can even use a 9 speed (FD-5500) with a a 10 speed drivetrain no problem. Adjustment is the key here. Also, make sure you ain't crosschaining (bib/big, small/small).
capwater is offline   Reply With Quote
Old 12-28-06, 08:36 PM   #5
R.A.D.
Senior Member
Thread Starter
 
R.A.D.'s Avatar
 
Join Date: Nov 2006
Location: NYC
Bikes: '92 Trek 400
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by capwater
Boosheet. 105 is 10 speed now, in fact you can even use a 9 speed (FD-5500) with a a 10 speed drivetrain no problem. Adjustment is the key here. Also, make sure you ain't crosschaining (bib/big, small/small).
The rubbing only occurs in these gears big/big small/small. Why is crosschaining bad or to be avoided? Still learning so forgive my ignorance.
R.A.D. is offline   Reply With Quote
Old 12-28-06, 08:50 PM   #6
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: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
Quote:
Originally Posted by R.A.D.
The rubbing only occurs in these gears big/big small/small. Why is crosschaining bad or to be avoided? Still learning so forgive my ignorance.
These two gear combinations are hard on the chain since it's angularity (and the side load on it) is at the maximum. Chain wear is accelerated for no benefit as the same gear ratio is available in other combinations with out the downside.

The general rule is to avoid big-big or small-small for any crank/cassette configuration, not just 10-speed. Front derailleur rubbing in these gears is almost unavoidable but not a problem since you shouldn't use them anyway.
HillRider is offline   Reply With Quote
Old 12-28-06, 08:59 PM   #7
R.A.D.
Senior Member
Thread Starter
 
R.A.D.'s Avatar
 
Join Date: Nov 2006
Location: NYC
Bikes: '92 Trek 400
Posts: 104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by HillRider
The general rule is to avoid big-big or small-small for any crank/cassette configuration, not just 10-speed. Front derailleur rubbing in these gears is almost unavoidable but not a problem since you shouldn't use them anyway.
Got it. Thanks for clearing that up.
R.A.D. 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 08:34 AM.