Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Schwinn World Sport 1986 bottom bracket

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.

Schwinn World Sport 1986 bottom bracket

Old 07-25-20, 10:07 AM
Junior Member
Thread Starter
Join Date: Apr 2018
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Schwinn World Sport 1986 bottom bracket

I'm overhauling the bottom bracket on my 1986 Schwinn World Sport. After breaking it down and cleaning it, I found wear and tear in both cups. The caged bearings on the fixed cup side corroded a ton and were pretty much rolling around freely in there, so it's not surprising that the cups also had some damage. I need to get new cups, but I don't know what specs to look for. I don't think that my local bike shops will have these parts, so have to order online and need to know what I'm ordering. Can anyone help me out on what I should specifically be looking for? Here are the cups in question: https://i.imgur.com/hHWLvVP.jpg

You can see the groove in the right one, but the left one has a fair bit of wear and tear, too.

Bonus pic of the bearing retainer, since I've never seen it get this bad, especially on just one side: https://i.imgur.com/yJ9F386.jpg
sqwertl is offline  
Old 07-25-20, 10:40 AM
Senior Member
dsbrantjr's Avatar
Join Date: Sep 2010
Location: Roswell, GA
Posts: 7,567

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 1156 Post(s)
Liked 546 Times in 394 Posts
Many people, myself included, would probably just swap in a Shimano BB-UN55 or BB-UN26 cartridge bottom bracket of the appropriate length.
dsbrantjr is offline  
Likes For dsbrantjr:
Old 07-25-20, 12:29 PM
Senior Member
DiegoFrogs's Avatar
Join Date: Feb 2005
Location: Toledo, OH
Posts: 2,426

Bikes: '77 Centurion "Pro Tour"; '67 Carlton "The Flyer"; 1984 Ross MTB (in USA)

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Liked 19 Times in 16 Posts
I had one of these for a couple years. It's actually a fairly nice frame.

The threading will be standard English. In the past, when one of my bikes had a damaged cup, I was able to just pull a random Japanese cup out of a junk Fuji donor bike and it worked perfectly fine.
DiegoFrogs is online now  
Likes For DiegoFrogs:

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 - Do Not Sell My Personal Information -

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