front derailleur question - certain amount of speeds (8,9,10, etc...)?
10-11-11, 10:13 AM
#1
Senior Member
Thread Starter
front derailleur question - certain amount of speeds (8,9,10, etc...)?
I have an older, 6 speed road bike that has a broken front derailleur. It's a clamp on style Shimano, used on a double chainring.
Looking around I'm seeing front derailleurs say '8 speed', '9 speed', etc...
Would an '8 speed' front dr work with a 6 speed cassette? Doesn't really make any sense why they'd designate a certain speed for the front, when it's really only either a double or triple chain ring.... any help/explanation would be greatly appreciated! Is the cage on 8+ speed front derailleurs wider or something... but not as wide as a triple chain ring derailleur?
Looking around I'm seeing front derailleurs say '8 speed', '9 speed', etc...
Would an '8 speed' front dr work with a 6 speed cassette? Doesn't really make any sense why they'd designate a certain speed for the front, when it's really only either a double or triple chain ring.... any help/explanation would be greatly appreciated! Is the cage on 8+ speed front derailleurs wider or something... but not as wide as a triple chain ring derailleur?
10-11-11, 10:22 AM
#2
aka: Dr. Cannondale
Join Date: Jul 2009
Posts: 7,742
Mentioned: 234 Post(s)
Tagged: 0 Thread(s)
Quoted: 2157 Post(s)
Liked 3,425 Times
in
1,211 Posts
Bingo- you are correct. 9/10/11 speed FDF's typically have narrower cages than 6/7/8 speed ones.
What size is the clamp on your broken FD? I may have a good one in the box here that you could have for the price of postage. PM if interested, always happy to help someone out if I can.
What size is the clamp on your broken FD? I may have a good one in the box here that you could have for the price of postage. PM if interested, always happy to help someone out if I can.
__________________
Hard at work in the Secret Underground Laboratory...
Hard at work in the Secret Underground Laboratory...
10-11-11, 11:05 AM
#3
Banned
Depth of back plate is different between regular and compact and triple.
now STI is just 3 big throws, , misses the fine tuning alignment, as the angle from the rear changes..
Benefit of friction bar cons. narrow cage can be relocated centered over the chain.
now STI is just 3 big throws, , misses the fine tuning alignment, as the angle from the rear changes..
Benefit of friction bar cons. narrow cage can be relocated centered over the chain.
10-12-11, 09:18 AM
#4
Senior Member
Join Date: Nov 2010
Location: River City, OR
Posts: 672
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Benefit of friction bar cons. narrow cage can be relocated centered over the chain.
10-12-11, 09:25 AM
#5
Super Moderator
Join Date: Jul 2004
Location: Ffld Cnty Connecticut
Posts: 21,846
Bikes: Old Steelies I made, Old Cannondales
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1174 Post(s)
Liked 935 Times
in
618 Posts
Campagnolo allows front trim adjustments.
__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
10-12-11, 10:00 AM
#6
Senior Member
So does Shimano: https://bike.shimano.com/publish/cont...20Function.pdf
They haven't included all of the groups that have trim functions either (Sora for one). On any STI bike that I've used I've been able to set it up to allow for rub-free pedaling in all but the most extreme combinations (that I'd never consider using anyway).
They haven't included all of the groups that have trim functions either (Sora for one). On any STI bike that I've used I've been able to set it up to allow for rub-free pedaling in all but the most extreme combinations (that I'd never consider using anyway).
Thread
Thread Starter
Forum
Replies
Last Post
Paul Barnard
Bicycle Mechanics
13
09-14-18 06:23 AM
