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 05-05-12, 04:59 PM   #1
siljeesam
Newbie
Thread Starter
 
Join Date: May 2012
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Broken bottom bracket/cranks.

Hi everyone,
I have what I think is an old Morrison road bike from the 80's (I'm not completely sure as I bought the bike already painted) and I have stripped the tread in the crank, rendering it useless. After a lot of searching, I finally found some second hand cranks in good condition that fitted, only to have them break again after 6 months.
I am fairly hard on my bike, but I would expect cranks to last a little longer than that, thats why I am looking to replace the bottom bracket. but its an unusual system and it doesn't appear to simply screw out.

Can anyone tell me a little more about this bottom bracket and how to replace it?

Thanks.

(I will try to attach some pictures later)
siljeesam is offline   Reply With Quote
Old 05-05-12, 05:15 PM   #2
randyjawa 
Senior Member
 
randyjawa's Avatar
 
Join Date: Apr 2007
Location: Thunder Bay, Ontario, Canada - burrrrr!
Bikes: 1982 Tomassini, 1963 Peugeot PX10, and eight special issue Canadian lightweights...
Posts: 7,130
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
If you twist this with the same tool as I am using, you will achieve satisfaction. Betcha that would make more sense with a picture or two, would it not?

The point is, you have to supply pictures (like this one) and a detailed description, if you hope to get quality answers.



I am aware of a few bottom brackets, such as this work of art (not) on an old Chiorda, that might be what you are talking about but without some more input from you, it will be impossible for me, or anyone else to be much help.

So, hope you can find some good clear pictures for us to work with. And, by the way, welcome to the Bike Forums.
Attached Images
File Type: jpg Chiorda_M_Y_AF_BB_1.jpg (95.3 KB, 10 views)
__________________
Learn how to find, restore and maintain vintage road bicycles at... MY "TEN SPEEDS"
randyjawa is offline   Reply With Quote
Old 05-07-12, 04:41 PM   #3
siljeesam
Newbie
Thread Starter
 
Join Date: May 2012
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the help, sorry I haven't managed to post any pictures yet, my first attempt at attaching failed and I have been very busy with my studies lately. I hope these pictures do attach (and appologies for the low quality)
Attached Images
File Type: jpg 04052012006.jpg (97.3 KB, 11 views)
File Type: jpg 04052012007.jpg (96.6 KB, 10 views)
File Type: jpg 04052012008.jpg (98.5 KB, 10 views)
File Type: jpg 04052012009.jpg (97.2 KB, 10 views)
File Type: jpg 04052012010.jpg (95.0 KB, 13 views)
File Type: jpg 04052012011.jpg (97.0 KB, 9 views)
File Type: jpg 04052012012.jpg (94.8 KB, 12 views)
siljeesam is offline   Reply With Quote
Old 05-08-12, 01:12 AM   #4
unworthy1
Stop reading my posts!
 
unworthy1's Avatar
 
Join Date: Sep 2004
Bikes:
Posts: 9,195
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
I believe what you have there is/was the Shimano FFS (front free wheel) system, which did not prove to be a success for the Big S. I'm afraid I have nearly zero experience with that product (and want to keep it that way) so can't offer you advice as to whether it can be saved, but if the BB shell has conventional threading (maybe) I'd replace it with a conventional BB and crankset. I'm sure somebody here (or in the mechanics forum) can tell you what your options are.
You can do an archive search here (as well as checking Sheldon Brown's site) for more info on the FFS.

Last edited by unworthy1; 05-08-12 at 01:48 AM. Reason: better abreviation
unworthy1 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 10:56 PM.