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 09-08-04, 08:22 AM   #1
robertsdvd
floor sleeper
Thread Starter
 
Join Date: Jun 2002
Location: Here and there in the US
Bikes: Raleigh Twenty, Puch 3 speed road conversion, lookin' into a Karate Monkey for a cruiser
Posts: 998
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Howdy... so I'm messing with this new project bike and I've got most of the parts stripped and am looking at the bottom bracket options... what was on there was a threadless cup system that used cottered cranks... as I said, the inside is threadless with an inside diameter of just about 40 to 40.5mm ... does this diameter sound like the American Style/BMX/One-piece/Ashtabula dimensions? I'd like to just throw in some conversion cups to use the a Euro BB ... but the shell almost seems a little smaller than a normal BMX and I've been unable to find diameter/dimmension specs online - anyone know off hand the inside diameter of an American style/BMX/One-piece-crank bottom bracket shell? Thanks!...






Last edited by robertsdvd; 09-08-04 at 08:48 AM.
robertsdvd is offline   Reply With Quote
Old 09-08-04, 06:44 PM   #2
legalize_it
legalize bikes
 
Join Date: May 2003
Location: bucks county, PA
Bikes: too damn many
Posts: 1,250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
that shell does look a tad smaller than ashtabula style.... whered you find that oddity? what kind of frame is it?
legalize_it is offline   Reply With Quote
Old 09-08-04, 07:14 PM   #3
robertsdvd
floor sleeper
Thread Starter
 
Join Date: Jun 2002
Location: Here and there in the US
Bikes: Raleigh Twenty, Puch 3 speed road conversion, lookin' into a Karate Monkey for a cruiser
Posts: 998
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by legalize_it
that shell does look a tad smaller than ashtabula style.... whered you find that oddity? what kind of frame is it?
I picked it up from some guy from craigslist... it is indeed an oddity... Sheldone Brown suggested it might be a "Thompson" Bottom Bracket (which yielded an amazing 3 hits on google) and to not even really bother... its made by Tomos and its called the Tomos Mini... and its essentially nothing right now... oh well, such as things go sometimes... I'm going to keep my eyes open for another old school folder... Royce Union or Raleigh or Peugeot ...
robertsdvd 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 09:27 PM.