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

Funny thing going on - BB help needed

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.

Funny thing going on - BB help needed

Old 08-27-09, 09:59 AM
  #1  
jjciiijs
Senior Member
Thread Starter
 
jjciiijs's Avatar
 
Join Date: Mar 2007
Location: CO....Hetchins MO, Merlin XL, Trek, Klien, Specialized, Kestral, Bataglin, Guerciotti, Bianchi, Schwinn, Colnago Geo, Miele, Contini, Feggin, Cannondale, Lemond, Ciocc, Giant, Rossin
Posts: 386

Bikes: Hetchins MO, Merlin XL, Trek, Klien, Specialized, Bataglin, Guerciotti, Bianchi, Schwinn C19, Colnago Geo, Miele, Contini, Feggin,Cannondale, Lemond,Ciocc, Giant, Rossin

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Funny thing going on - BB help needed

We are talking about my Continni, steel.
I had a 24T 68mm FAS sealed BB in but the right side cup fits at bit loose and it owrked out. Other side = OK
Tried another 24T 68mm BB by Campy and it fits better, but I wonder because it is stamped the same size as the Shimano. Howevr, doesn't really matter about the Campy I ahve because it is not splined (it is a square taper) and that is what i need.

Question is, I do not know what to order now??? I measured the bike and come up with about 1.37mm ID. I am just not sure what is 'suppose to' fit on this bike. English. Italian, what?

Should I just go with a 24T 68 and epoxy it in?
jjciiijs is offline  
Old 08-27-09, 11:56 AM
  #2  
wrk101
Thrifty Bill
 
wrk101's Avatar
 
Join Date: Jan 2008
Location: Mountains of Western NC
Posts: 21,880

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

Mentioned: 65 Post(s)
Tagged: 0 Thread(s)
Quoted: 609 Post(s)
Likes: 0
Liked 10 Times in 8 Posts
If you epoxy it in, just be prepared to throw the bike away when the BB wears out.
wrk101 is offline  
Old 08-27-09, 12:05 PM
  #3  
johnlyons53
EATS
 
Join Date: Nov 2007
Location: East Aurora NY, 20 miles SE of Buffalo
Posts: 162

Bikes: We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I assume that the drive side threading of the BB is LH thread. If that's the case then one possibility is that the frame is Swiss threading.

I quote Sheldon Brown from his Bicycle Glossary where he talks about interchangeability

"35 mm = 1.378". Shell is slightly larger, thread pitch slightly finer. May seem to fit, but will be loose."
johnlyons53 is offline  
Old 08-27-09, 02:25 PM
  #4  
jjciiijs
Senior Member
Thread Starter
 
jjciiijs's Avatar
 
Join Date: Mar 2007
Location: CO....Hetchins MO, Merlin XL, Trek, Klien, Specialized, Kestral, Bataglin, Guerciotti, Bianchi, Schwinn, Colnago Geo, Miele, Contini, Feggin, Cannondale, Lemond, Ciocc, Giant, Rossin
Posts: 386

Bikes: Hetchins MO, Merlin XL, Trek, Klien, Specialized, Bataglin, Guerciotti, Bianchi, Schwinn C19, Colnago Geo, Miele, Contini, Feggin,Cannondale, Lemond,Ciocc, Giant, Rossin

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by johnlyons53 View Post
I assume that the drive side threading of the BB is LH thread. If that's the case then one possibility is that the frame is Swiss threading.

I quote Sheldon Brown from his Bicycle Glossary where he talks about interchangeability
"35 mm = 1.378". Shell is slightly larger, thread pitch slightly finer. May seem to fit, but will be loose."
Oh man not another one to figure out!

I have just discovered that on the right side, you can thread in using a Rt. or Lt. handed threaded cup. I am beginning to think at some time a wrong cap was put in and now there is a bit of biggering. Or as stated, what I am using is a bit loose and is not fully engauging the threads.

Anybody have a Contini? What did you use?
jjciiijs is offline  
Old 08-27-09, 03:01 PM
  #5  
johnlyons53
EATS
 
Join Date: Nov 2007
Location: East Aurora NY, 20 miles SE of Buffalo
Posts: 162

Bikes: We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
As we say in the engineering world: Yikes!

If both LH and RH cups fit on the drive side then it might be a buggered up (or not) Italian thread. I would take the frame to a heads-up LBS and have them chase the threads with an Italian tap set and face the BB while they were at it. Then you'll know what you have and it will be right. I've had that done around here for a modest charge when I needed to put a modern BB on an old Raleigh frame.

Buona Fortuna
johnlyons53 is offline  

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.