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 10-18-05, 03:58 PM   #1
jo5iah
chopsockey
Thread Starter
 
jo5iah's Avatar
 
Join Date: Feb 2005
Location: Seattle
Bikes: Monkey SS everythingbike, Ti frankenroadbike
Posts: 253
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Wobbly hub

So I'm back from my first bike tour, but not without some problems on the way:

When in low gear, my freewheel broke. It was a relatively unused NOS Shimano freewheel (dunno model, but decent at worst). I don't know how to describe better than to say the freewheel body snapped. Luckily, I found a replacement.

After installing the replacement, I noticed that when coasting the wheel (upsidedown bike), the cassette seemed to wobble. Rather, it seemed to have a non circular orbit. There was no shaking a la loose hub. So, I figured that my axle was bent.

The axle was not bent. I learned this after comparing to a replacement, installing both, and still not having a change in behavior.

What gives?

My only working theory at this point is that the bearings in the hub are somehow just a little off in size, somehow allowing the axle to be slightly off in orientation when the hub is properly adjusted.

Other clues for solving the mystery:
- Adjusting the hub was not so easy. There seemed to be a friction point or catch point on each revolution, unless I traded for a slightly loose adjustment.
- I'm not using original cones - I did match the new ones to the old, and they seemed to have exactly the same shape
- I'm not using original bearings
- I've bent an axle on this hub as well, but I think that was when I pulled it out of the dropouts really cranking up a hill

Thoughts?
jo5iah is offline   Reply With Quote
Old 10-18-05, 04:56 PM   #2
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: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
I expect the threads on your hub that the freewheel screws onto are damaged.
HillRider is offline   Reply With Quote
Old 10-18-05, 04:58 PM   #3
froze
Banned.
 
Join Date: Feb 2003
Location: Fort Wayne, Indiana
Bikes: 84 Trek 660 Suntour Superbe; 87 Giant Rincon Shimano XT; 07 Mercian Vincitore Campy Veloce
Posts: 4,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
All freewheels wobble a little bit. But to be safe have your hub checked by a qualified expert...I assumed that should have been done when the freewheel was bought and installed on your hub unless you did it yourself. You may want to buy a better hub, sounds like you had a lot of problems with that one.
froze is offline   Reply With Quote
Old 10-18-05, 05:47 PM   #4
RockyMtnMerlin
Senior Member
 
RockyMtnMerlin's Avatar
 
Join Date: Sep 2005
Location: Laramie Wyoming
Bikes: Merlin Extralight Topolino Wheels Campy Record
Posts: 2,970
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by froze
All freewheels wobble a little bit.
Hmm, that is not the case with my Campy Record on my Topolinos.
RockyMtnMerlin is offline   Reply With Quote
Old 10-19-05, 05:10 PM   #5
froze
Banned.
 
Join Date: Feb 2003
Location: Fort Wayne, Indiana
Bikes: 84 Trek 660 Suntour Superbe; 87 Giant Rincon Shimano XT; 07 Mercian Vincitore Campy Veloce
Posts: 4,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by RockyMtnMerlin
Hmm, that is not the case with my Campy Record on my Topolinos.
Do you freewheel or freehub (Cassette). All freewheels I've ever seen have a slight wobble up and down, not side to side.
froze is offline   Reply With Quote
Old 10-21-05, 10:53 AM   #6
jo5iah
chopsockey
Thread Starter
 
jo5iah's Avatar
 
Join Date: Feb 2005
Location: Seattle
Bikes: Monkey SS everythingbike, Ti frankenroadbike
Posts: 253
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's a thread-on freewheel. The wobble is much more pronounced then I've seen elsewhere. It's also not just up/down. It seems like the axle is in crooked, wrt the freewheel.
jo5iah 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 04:03 AM.