Funny thing going on - BB help needed
08-27-09 | 09:59 AM
#1
Thread Starter
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From: CO....Hetchins MO, Merlin XL, Trek, Klien, Specialized, Kestral, Bataglin, Guerciotti, Bianchi, Schwinn, Colnago Geo, Miele, Contini, Feggin, Cannondale, Lemond, Ciocc, Giant, Rossin
Bikes: Hetchins MO, Merlin XL, Trek, Klien, Specialized, Bataglin, Guerciotti, Bianchi, Schwinn C19, Colnago Geo, Miele, Contini, Feggin,Cannondale, Lemond,Ciocc, Giant, Rossin
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?
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?
08-27-09 | 11:56 AM
#2
Thrifty Bill
Joined: Jan 2008
Posts: 23,642
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From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
If you epoxy it in, just be prepared to throw the bike away when the BB wears out.
08-27-09 | 12:05 PM
#3
EATS
Joined: Nov 2007
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From: East Aurora NY, 20 miles SE of Buffalo
Bikes: We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid
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."
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."
08-27-09 | 02:25 PM
#4
Thread Starter
Senior Member
Joined: Mar 2007
Posts: 386
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From: CO....Hetchins MO, Merlin XL, Trek, Klien, Specialized, Kestral, Bataglin, Guerciotti, Bianchi, Schwinn, Colnago Geo, Miele, Contini, Feggin, Cannondale, Lemond, Ciocc, Giant, Rossin
Bikes: Hetchins MO, Merlin XL, Trek, Klien, Specialized, Bataglin, Guerciotti, Bianchi, Schwinn C19, Colnago Geo, Miele, Contini, Feggin,Cannondale, Lemond,Ciocc, Giant, Rossin
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."
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."
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?
08-27-09 | 03:01 PM
#5
EATS
Joined: Nov 2007
Posts: 162
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From: East Aurora NY, 20 miles SE of Buffalo
Bikes: We own a Santana Arriva S+S pulling a Burley Nomad, Qty 2 70's Raleighs updated, C-dale hybrid, Fuji hybrid
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
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
