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 01-02-06, 04:29 PM   #1
askrom
Senior Member
Thread Starter
 
askrom's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Over the past two years of not-too-heavy riding (maybe 50-100 miles/week in New York City), the rear wheel of my bike has popped a spoke *twice*, including today. Once it was at the hub end (the fat nub broke off) and the second time it was at the nipple (it broke just beyond the threads, leaving the threads in the nipple).

This wheel has also gone more than 1/4" out of true three times during this period (not including the times the spokes popped), sometimes going noticably out of true within only a week after getting it trued.

The wheel is about 15 years old, Mavic MA-40 rim with Suntour Sprint hub. Before the pops, the spokes all seemed tight, with no loose spokes. Oh, and I suppose I should mention that I'm only about 145 pounds.

From anecdotal reports from a couple of friends, this kind of thing seems unheard-of. And my front wheel (also MA-40+Sprint) hasn't been trued in 10+ years of riding.

Has anyone heard of such a thing before? Did some bike mechanic do something incredibly wrong on my rear wheel? Maybe the spokes are cheapo?

I'm pretty convinced now that I should just buy a new wheel. I'd been meaning to upgrade my old-style freewheel to something a little more racy, but it always seemed a little pointless to seek out a new old-style freewheel as a peicemeal upgrade instead of upgrading to a proper modern cassette hub on a brand-new wheel build.
askrom is offline   Reply With Quote
Old 01-02-06, 04:41 PM   #2
phantomcow2
la vache fantôme
 
phantomcow2's Avatar
 
Join Date: Aug 2004
Location: NH
Bikes:
Posts: 6,266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are you the only user of this wheel? THe spokes might be cheap, and breaking from fatigue. But if its losing true like that, it sounds like your spoke tension is off. Try to feel it with your hand, you may even be able to feel it.
I would start looking at getting a new wheel all together, or get one built.
__________________
C://dos
C://dos.run
run.dos.run
phantomcow2 is offline   Reply With Quote
Old 01-02-06, 04:51 PM   #3
supcom
You need a new bike
 
supcom's Avatar
 
Join Date: Aug 2002
Bikes:
Posts: 5,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The spokes have reached their fatigue life and are likely to continue failing. You can either buy a new wheel or simply have your current wheel rebuilt with new spokes.

If you are otherwise happy with the wheel and the hub is in good condition, then just have it respoked.
supcom is offline   Reply With Quote
Old 01-02-06, 06:22 PM   #4
San Rensho 
Senior Member
 
Join Date: Oct 2005
Bikes:
Posts: 5,559
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Somethings not right, but spokes are cheap. I would fix it until it starts to break spokes more frequently, then at some point I would replace. Just keep in the back of your mind that the wheel is a little weak.
San Rensho 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 04:31 AM.