Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Do older 105/600 FD's (6-7 speed) have sufficient throw for a triple crank?

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Do older 105/600 FD's (6-7 speed) have sufficient throw for a triple crank?

Reply

Old 06-23-11, 10:25 PM
  #1  
RFC
Senior Member
Thread Starter
 
RFC's Avatar
 
Join Date: Sep 2007
Location: Scottsdale, AZ
Posts: 4,466

Bikes: many

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Do older 105/600 FD's (6-7 speed) have sufficient throw for a triple crank?

Thanks
RFC is offline  
Reply With Quote
Old 06-24-11, 12:49 AM
  #2  
miamijim
Senior Member
 
miamijim's Avatar
 
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 13,905
Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 315 Post(s)
No, not really. If the throw happens to be OK you'll more than likely have problems with the chain dragging on the back of the cage.
miamijim is offline  
Reply With Quote
Old 06-24-11, 06:46 AM
  #3  
RobbieTunes 
Old and in the way
 
RobbieTunes's Avatar
 
Join Date: Dec 2007
Location: Very Southern Indiana
Posts: 24,767
Mentioned: 28 Post(s)
Tagged: 1 Thread(s)
Quoted: 315 Post(s)
+1 If it works, you're just lucky.
Not designed for the differences in ring diameters, or the throw distance from inside to outside.
__________________
Robbie ♪♫♪...☻

RobbieTunes is offline  
Reply With Quote
Old 06-24-11, 02:40 PM
  #4  
wrk101
Thrifty Bill
 
wrk101's Avatar
 
Join Date: Jan 2008
Location: Mountains of Western NC
Posts: 21,695

Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more

Mentioned: 60 Post(s)
Tagged: 0 Thread(s)
Quoted: 550 Post(s)
+1. Cage depth too short.
wrk101 is offline  
Reply With Quote
Old 06-24-11, 05:36 PM
  #5  
RFC
Senior Member
Thread Starter
 
RFC's Avatar
 
Join Date: Sep 2007
Location: Scottsdale, AZ
Posts: 4,466

Bikes: many

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
OK, what about using an MTB FD? Too much curve?
RFC is offline  
Reply With Quote
Old 06-24-11, 05:41 PM
  #6  
rccardr 
aka: Dr. Cannondale
 
rccardr's Avatar
 
Join Date: Jul 2009
Posts: 5,023

Bikes: I'd rather not count how many, thank you

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 877 Post(s)
Deore would work...
__________________
Hard at work in the Secret Underground Laboratory...
rccardr is online now  
Reply With Quote
Old 06-24-11, 07:05 PM
  #7  
bigbossman 
Dolce far niente
 
bigbossman's Avatar
 
Join Date: Dec 2004
Location: Northern CA
Posts: 10,832
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Originally Posted by RFC View Post
OK, what about using an MTB FD? Too much curve?
Depends on the crank. I've done it, lots of times.
__________________
"Love is not the dying moan of a distant violin, itís the triumphant twang of a bedspring."

S. J. Perelman
bigbossman is offline  
Reply With Quote
Old 06-24-11, 07:38 PM
  #8  
bikingshearer 
Crawlin' up, flyin' down
 
bikingshearer's Avatar
 
Join Date: Jan 2006
Location: Democratic Peoples' Republic of Berkeley
Posts: 3,712

Bikes: 1967 Paramount, 1982-ish Ron Cooper,1978 Eisentraut "A," mid-1960s Cinelli Speciale Corsa, 1961 Bianchi Competizione (an Eroica bike), 1994 Trek 520, 199? Burley Bossa Nova, early-1970s Cinelli Speciale Corsa (also an Eroica bike)

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 148 Post(s)
Originally Posted by RFC View Post
OK, what about using an MTB FD? Too much curve?
It will work if the FD was meant to work with "normal" MTB cranks with 110/74bcd (usually a 46 to 48 tooth large chainwheel). the shifting might be a tad less than perfect with a large chainwheel of 52 or 53, but not enough of an issue to worry about. I would not bet on using an FD meant for one of those silly "modern" MTB cranksets that have a four arm spider and chainwheels that look like they're refugees from an RD jockey cage. I don't know they wouldn't work on a 52 tooth chainwheel, but I would be mildly surprised if they did.
__________________
"I'm in shape -- round is a shape." Andy Rooney
bikingshearer is offline  
Reply With Quote
Old 06-24-11, 07:57 PM
  #9  
RobbieTunes 
Old and in the way
 
RobbieTunes's Avatar
 
Join Date: Dec 2007
Location: Very Southern Indiana
Posts: 24,767
Mentioned: 28 Post(s)
Tagged: 1 Thread(s)
Quoted: 315 Post(s)
Originally Posted by bigbossman View Post
Depends on the crank. I've done it, lots of times.
I knew there was a crank addiction in there somewhere....
__________________
Robbie ♪♫♪...☻

RobbieTunes is offline  
Reply With Quote
Old 06-28-11, 08:40 AM
  #10  
jeb814 
Senior Member
 
Join Date: Feb 2011
Location: Happy Valley
Posts: 62

Bikes: Centurion Pro Tour 15; Trek 1200; Trek 2000; Easy Racers Tour Easy; Nishiki Alien; Kestrel CSX: Motobecane Le Champion; ICE Adventure Trike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Triple added to Centurion Sport DLX

I read this thread a couple of days ago but could not reply at the time. I want to share my experience before the thread disappears into the abyss of the back pages. In the mid 90's I added a granny gear (28T) to my 1985 Centurion Sport DLX to assist with the hills on a cross Pennsylvania ride. Shimano Acera X components and a Shimano Exage Crank. While the shifting is not precise, and there can be chain rattle, it is functional. Practice and learning to feather the shifter have resulted in a relatively smooth ride. The Centurion continues to be my main mode of transport to work.
jeb814 is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service