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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-15-08, 08:09 PM   #1
goldenboy
Newbie
Thread Starter
 
Join Date: Sep 2008
Location: Modesto, CA flatland
Bikes: Vintage late 70's Motobecane Nomade conversion
Posts: 3
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Need Help with Swiss Bottom Bracket conversion issue!!!!

OK, It's a very new endeavor of mine to learn how to repair, maintain, and upgrade my own bike. It's far too expensive to have someone do everything for you, so i figure i can save myself a few bucks and prevent any long bikeless weekends from affecting my future cause my bikes in the shop. Before i get to the point, please forgive my utter ignorance in this matter. I have an old Motobecane Nomade Road bike I'm converting and I'm having issues with the bottom bracket. I bought a Sugino Messenger crankset to replace the old Archaic-looking set that was on before, and I know this means I'll require an entirely new spindle length to keep the chain line legite. I was going to purchase an entirely new Cartridge style unit until I found out that my motobecane is threaded in the now obsolete Swiss thread, and I'd have to dish out $150.00 + for a phil wood setup which I can't afford. The cups and bearings on my Motobecane are in Mint Condition, so i Figured I'd just shop around for a new spindle. The only acceptable spindles I've found as far as long and taper go are Ritchey WCS sealed bearing cranks, but I'm not sure if I would need new cups to allow for sealed bearings? Can someone help me out? I'm open to any alternative suggestions as well. Thanks

Last edited by goldenboy; 09-15-08 at 08:37 PM. Reason: wrong title
goldenboy is offline   Reply With Quote
Old 09-15-08, 08:50 PM   #2
cuevélo
Senior Member
 
Join Date: Jun 2007
Location: The Only Village in the World So Named
Bikes: Mid '70s Cuevas, '91 Greg Lemond Maillot Jaune
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't know of anything other than a Phil that will work. Nothing made recently will work for you. You need a NOS cup and cone style spindle.
I don't know for certain, but a spindle from a bottom bracket with a more common threading may work. Go to your LBS and they probably will have a metal recycle bin that you can go through and find a spindle to see if it will work before you spend money on a new one.
Another possible option is to flip the spindle end to end.
cuevélo is offline   Reply With Quote
Old 09-15-08, 10:09 PM   #3
5vforest
Junior Member
 
Join Date: Sep 2007
Bikes:
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I would agree on searching around for a new spindle. You should be able to make another spindle work just fine, since the Swiss BB shell is still 68mm wide. Forget going sealed, just make sure your cups aren't pitted and repack with new bearings.

Or even better, tap the Swiss BB shell out to ISO.
5vforest is offline   Reply With Quote
Old 09-16-08, 07:10 AM   #4
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 30,323
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 684 Post(s)
Quote:
Originally Posted by 5vforest View Post
Or even better, tap the Swiss BB shell out to ISO.
You can't. Swiss is 35 mm diameter and English/ISO is 34.8 mm so the hole is already too large. The OP could have the bb reamed and tapped to Italian threads (36 mm) which would open up a whole world of alternate bottom bracket models.

I agree that looking for a new suitable spindle and keeping the current cups is the cheapest solution.
HillRider is offline   Reply With Quote
Old 09-16-08, 10:19 AM   #5
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Maybe you should re-think using your old "archaic looking" crankset, eh?
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF 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 12:34 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION