Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-14-10, 08:48 PM   #1
unicornrag
Junior Member
Thread Starter
 
unicornrag's Avatar
 
Join Date: Oct 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Forumla fixed/fixed hub problems

I have a formula fixed/fixed hub, with a 48x16 gear, and for some reason my lock ring likes to come off, taking the threads on the hub with it. I've been told by my LBS that its because my lock ring is steel and the hub is aluminum, and because steel is harder than aluminum, the threads on the hub tear out.

They way the hub is designed with opposing thread patterns, if (big if) the cog were to slip back for some reason, there's no way for it to undo the lock ring. I find it hard to believe that my legs are strong enough to force the cog to unscrew, and take the lock ring (with its opposing threads) with it.

I'm just having one of those days but really, the threads for the cog are made of the same aluminum as the threads for the lock ring.

thanks
unicornrag is offline   Reply With Quote
Old 09-14-10, 08:59 PM   #2
xkillemallx16
Senior Member
 
Join Date: Sep 2009
Location: im, hungary
Bikes:
Posts: 1,983
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
tighten the cog. if all else fails get a nice dura ace cog/lockring. it works on all my formula hubs with zero problems
xkillemallx16 is offline   Reply With Quote
Old 09-14-10, 09:01 PM   #3
Squirrelli
GONE~
 
Join Date: Apr 2010
Bikes:
Posts: 6,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is your hub stripped? If so, then there's nothing you can do to secure everything in place.
Squirrelli is offline   Reply With Quote
Old 09-14-10, 09:04 PM   #4
squeegeesunny 
℞ ♥
 
squeegeesunny's Avatar
 
Join Date: Aug 2009
Location: NNJ
Bikes: I ride FG,SS and old 10 speeds. Nothing else.
Posts: 1,213
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If your threads have been stripped already, your lockring is gonna come undone continously. First thing I did when I got my bike was get a nice steel DA cog/lockring so the stock aluminum crap cog and lockring doesnt strip my formula hubs.
__________________



Quote:
Originally Posted by Johhny B View Post
dude u need that trixie tool its the best tool ever it even comes with a bottle opener ! dude all the messengers reccomended it to me and evr since i got it im basically a mechaninc now and all the bike shops want me.
squeegeesunny is offline   Reply With Quote
Old 09-14-10, 09:07 PM   #5
FastJake
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Madison, Wisconsin
Bikes:
Posts: 7,574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It might have been installed improperly. But yeah, once your hub is stripped I'm afraid you're SOL. Time to buy a new wheel.
FastJake is offline   Reply With Quote
Old 09-14-10, 09:08 PM   #6
hairnet
Fresh Garbage
 
hairnet's Avatar
 
Join Date: Apr 2009
Location: Los Angeles
Bikes:
Posts: 12,483
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
What's wrong with an aluminum lock ring, excluding machining quality of the cheepo ones? I just have the formula lockring that the shop threw in with my first cog and have had zero problems

Last edited by hairnet; 09-14-10 at 09:11 PM.
hairnet is offline   Reply With Quote
Old 09-14-10, 09:17 PM   #7
Squirrelli
GONE~
 
Join Date: Apr 2010
Bikes:
Posts: 6,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Same here, I used to have the Formula lockring that came with the wheel but the notches were starting to turn round and I stop using it.
Squirrelli is offline   Reply With Quote
Old 09-14-10, 09:20 PM   #8
Scrodzilla
There goes Tokyo
 
Scrodzilla's Avatar
 
Join Date: May 2009
Location: San Diego, CA
Bikes: EAI Bare Knuckle, 1975 Raleigh Pro Track
Posts: 26,554
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 85 Post(s)
The steel lock ring will only cause the threads on your aluminum hub to shear off if it wasn't installed/tightened properly. Between my wife and I there are four sets of Formulas in this household and not one issue.
__________________
__________________________________
Scrodzilla is offline   Reply With Quote
Old 09-14-10, 09:38 PM   #9
unicornrag
Junior Member
Thread Starter
 
unicornrag's Avatar
 
Join Date: Oct 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the info guys, the hub was brand spanking new when the cog and lock ring were installed. It'd be pretty difficult to properly install a cog and lock ring on an already stripped hub. It's just frustrating wrecking one side of the hub and not being able to ride while I wait on parts.
unicornrag is offline   Reply With Quote
Old 09-14-10, 09:40 PM   #10
Scrodzilla
There goes Tokyo
 
Scrodzilla's Avatar
 
Join Date: May 2009
Location: San Diego, CA
Bikes: EAI Bare Knuckle, 1975 Raleigh Pro Track
Posts: 26,554
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 85 Post(s)
As I said, it's possible that your lockring wasn't as tight as it could be to begin with.
__________________
__________________________________
Scrodzilla is offline   Reply With Quote
Old 09-14-10, 09:44 PM   #11
unicornrag
Junior Member
Thread Starter
 
unicornrag's Avatar
 
Join Date: Oct 2009
Bikes:
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
True but it is possible to over-torque the lock ring when installing it and strip the hubs then, but that requires a huge amount of force that I just can't see the designers not knowing about when braking.
unicornrag is offline   Reply With Quote
Old 09-14-10, 09:58 PM   #12
Scrodzilla
There goes Tokyo
 
Scrodzilla's Avatar
 
Join Date: May 2009
Location: San Diego, CA
Bikes: EAI Bare Knuckle, 1975 Raleigh Pro Track
Posts: 26,554
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 85 Post(s)
Formula or otherwise, aluminum hub/steel lockring is pretty standard. Unless you weigh in at 700 lbs and are as strong as a team of sasquatches on steroids, I highly doubt you torqued your lockring enough to shear off your hub's threads. On the other side of the coin, not tightening your lockring enough will cause your cog to help ruin the threads each time you apply back pressure.
__________________
__________________________________
Scrodzilla 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 06:09 AM.