Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-20-12, 02:24 PM   #1
hamanu23
Learning to Roll
Thread Starter
 
hamanu23's Avatar
 
Join Date: Jul 2010
Location: or
Bikes: 72 Centurion rolled molly steel road bike
Posts: 385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
3 questions on what to expect 77 Le Tour II upgrades

I have a 1977 Schwinn Le Tour II, last year after about 80 miles in to a 119 mile ride I came to a 10% grade pass that climbed around 7 miles. I ended up walking my bike about half of the way up and this year I do not want to repeat that debacle.

I changed out my wheelset to 700C rear, 650w front, both with 23x700 tires(taken from an Ironman Master.) I swapped the RD out with a Shimano 105 however the FD is stock Schwinn Le Tour.

when in my climbing gears the chain does not line up at all so I am hoping there is room to add this triple to the front.

Thanks to BF member notenoughdaylig, I got a BB for the cost of shipping. the Crank is a 172.5 mm 6603 Ultegra.

1. What kind of problems do you think I am going to run in to?
2. Will I need a long cage rear derailuer?
3. Will I need a different front derailuer?

These photos probably do not help but just in case.

2012-03-20_12-43-19_481 by Lucas James 78, on Flickr

2012-03-20_13-07-15_924 by Lucas James 78, on Flickr

2012-03-20_13-08-43_854 by Lucas James 78, on Flickr

2012-03-20_13-08-21_355 by Lucas James 78, on Flickr

2012-03-20_13-07-39_671 by Lucas James 78, on Flickr

2012-03-20_13-07-28_567 by Lucas James 78, on Flickr
From my trip last year!

racks1 by Lucas James 78, on Flickr
hamanu23 is offline   Reply With Quote
Old 03-20-12, 02:58 PM   #2
fucxms
Senior Member
 
Join Date: Jul 2009
Location: Portland, OR
Bikes:
Posts: 68
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I own the same bike (same year and size).

You'll need a triple FD, and this will be a pain to install since modern FDs don't come with the integrated housing stop. I ended up installing some 105 DT shifters and repurposing the existing DT housing stop by moving it underneath the new 105 derailleur. You might opt to simply route the shift cable underneath the BB, but that caused issues for me with it sliding back and forth when the cable slacks (paint chips also happened). Since you're replacing the BB, you can drill & tap a screwhole in the shell to mount a cable guide and fix the problem entirely.

You shouldn't need a long-cage RD. That's mostly dependent on the largest sprocket, but if the largest chainring on the new crank is much larger than the old one, then you might need it to handle the chainwrap.
fucxms is offline   Reply With Quote
Old 03-20-12, 03:03 PM   #3
hamanu23
Learning to Roll
Thread Starter
 
hamanu23's Avatar
 
Join Date: Jul 2010
Location: or
Bikes: 72 Centurion rolled molly steel road bike
Posts: 385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fucxms View Post
I own the same bike (same year and size).

You'll need a triple FD, and this will be a pain to install since modern FDs don't come with the integrated housing stop. I ended up installing some 105 DT shifters and repurposing the existing DT housing stop by moving it underneath the new 105 derailleur. You might opt to simply route the shift cable underneath the BB, but that caused issues for me with it sliding back and forth when the cable slacks (paint chips also happened). Since you're replacing the BB, you can drill & tap a screwhole in the shell to mount a cable guide and fix the problem entirely.

You shouldn't need a long-cage RD. That's mostly dependent on the largest sprocket, but if the largest chainring on the new crank is much larger than the old one, then you might need it to handle the chainwrap.
Awesome thanks! I am going to go ahead and get a triple FD ordered, do you by chance remember what size clamp it was?
hamanu23 is offline   Reply With Quote
Old 03-20-12, 03:04 PM   #4
fucxms
Senior Member
 
Join Date: Jul 2009
Location: Portland, OR
Bikes:
Posts: 68
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This thread I started a while back will help: http://www.bikeforums.net/showthread...top-for-new-FD

I believe it's 28.6mm.
fucxms is offline   Reply With Quote
Old 03-20-12, 03:07 PM   #5
fucxms
Senior Member
 
Join Date: Jul 2009
Location: Portland, OR
Bikes:
Posts: 68
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Also, I was wrong about the chainwrap issue, because the problem is the opposite of what I described. The granny gear on the triple will leave a lot of chain hanging, so you can either get a longcage RD or ignore the problem and don't cross-chain when in the granny.
fucxms is offline   Reply With Quote
Old 03-20-12, 03:21 PM   #6
hamanu23
Learning to Roll
Thread Starter
 
hamanu23's Avatar
 
Join Date: Jul 2010
Location: or
Bikes: 72 Centurion rolled molly steel road bike
Posts: 385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
FD disassemble... seems so simple
Thanks for the link. NEW SHIMANO DURA-ACE FD-7803 TRIPLE FRONT DERAILLEUR 28.6... On the way!

Could I just file a groove in the BB and let the cable slide through that excluding the cable housing where it ends on the downtube?

Last edited by hamanu23; 03-20-12 at 03:38 PM.
hamanu23 is offline   Reply With Quote
Old 03-20-12, 10:04 PM   #7
fucxms
Senior Member
 
Join Date: Jul 2009
Location: Portland, OR
Bikes:
Posts: 68
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah you can do that. I'd worry about rust though. Some people just use a short run of cable housing and epoxy it to the shell. The FD cable isn't usually under strong tension.
fucxms 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 12:22 AM.