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 06-16-06, 11:53 PM   #1
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
help me save my hub

Got my fixed conversion vandalized the other day. Among the other stupid things the pepetrators did, they tacoed my rear wheel, without doing anything else. So I'm trying to get the cog off, but the bent rim has tweaked away the tension.

I managed to get the lockring off, but I can't get enough purchase to work the cog off--it's on pretty tight (no locktite). Any recommendations on how to remove the cog and not destroy the hub? I've heard that a table vise usually destroys the hub.

help.
peripatetic is offline   Reply With Quote
Old 06-17-06, 12:18 AM   #2
el twe
crotchety young dude
 
el twe's Avatar
 
Join Date: Jan 2005
Location: SF, CA
Bikes: IRO Angus; Casati Gold Line; Redline 925; '72 Schwinn Olympic Paramount
Posts: 4,818
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Backwards rotafixa?
__________________
Quote:
Originally Posted by CardiacKid View Post
I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
IRO Angus Casati Gold Line
el twe is offline   Reply With Quote
Old 06-17-06, 12:40 AM   #3
mattface
Senior Member
 
mattface's Avatar
 
Join Date: Sep 2005
Location: Montpeculiar, VT
Bikes: Soma Rush, Fuji Cross, Raleigh Technium Mtn Bike, Ross 10 speed with Shimano 600.
Posts: 3,949
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm assuming the hub is already removed from the rim.

Put the cog in a vice, and use a strap wrench on the hub. You might need a cheater bar for added leverage.
mattface is offline   Reply With Quote
Old 06-17-06, 12:48 AM   #4
el twe
crotchety young dude
 
el twe's Avatar
 
Join Date: Jan 2005
Location: SF, CA
Bikes: IRO Angus; Casati Gold Line; Redline 925; '72 Schwinn Olympic Paramount
Posts: 4,818
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Oh. Got it. Scratch that.
__________________
Quote:
Originally Posted by CardiacKid View Post
I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
IRO Angus Casati Gold Line
el twe is offline   Reply With Quote
Old 06-17-06, 09:08 AM   #5
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hub's not removed from the rim, sorry I wasn't clear, but b/c of the damage to the rim, there's not enough tension on the spokes--they're all loose in the hub. I'll try what you say, but I'm no sure what a "strap wrench is." And are you saying wedge the cog into the vice at the teeth? I'm willing to lose the cog if I can save the hub, but I know that vicing the hub will lead to damage.

Thanks for the tips.
peripatetic is offline   Reply With Quote
Old 06-17-06, 09:16 AM   #6
LóFarkas
LF for the accentdeprived
 
Join Date: May 2005
Location: Budapest, Hungary
Bikes:
Posts: 3,549
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You could remove the hub from the rim and then lace the non-drive side of the hub into another rim so you get enough leverage. You will need another rim anyway, if you're going to rebuild the wheel. May or may not work...
LóFarkas is offline   Reply With Quote
Old 06-17-06, 11:21 AM   #7
sivat
Geek Extraordinaire
 
sivat's Avatar
 
Join Date: Feb 2006
Location: Long Beach, CA
Bikes: Bianchi Advantage Fixed Conversion; Specialized Stumpjumper FS Hardtail
Posts: 1,769
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
if you have enough room on the non-drive side axle, you could thread on 2 nuts, tighten them against each other as hard as you can (you may want to use some blue loctite for the extra strength) then put the nuts in a vice (hehehe) and try a chainwhip. You will probably sacrifice the nuts, but it shouldn't damage the axle/hub.
__________________
I'd rather have a bottle in front of me than a frontal lobotomy.

Sintesi Conversion Serotta Track
sivat is offline   Reply With Quote
Old 06-17-06, 12:13 PM   #8
BC Dub
thunder in your heart.
 
Join Date: Apr 2006
Location: vancouver
Bikes: 5 bikes of various stature.
Posts: 123
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you're putting the cog in a vise, clamp with 2x4s to prevent damage.
BC Dub is offline   Reply With Quote
Old 06-17-06, 01:05 PM   #9
shants
roll'em high
 
shants's Avatar
 
Join Date: Feb 2005
Location: columbus, ohio
Bikes:
Posts: 2,391
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
shants is offline   Reply With Quote
Old 06-17-06, 01:41 PM   #10
LóFarkas
LF for the accentdeprived
 
Join Date: May 2005
Location: Budapest, Hungary
Bikes:
Posts: 3,549
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by sivat
if you have enough room on the non-drive side axle, you could thread on 2 nuts, tighten them against each other as hard as you can (you may want to use some blue loctite for the extra strength) then put the nuts in a vice (hehehe) and try a chainwhip. You will probably sacrifice the nuts, but it shouldn't damage the axle/hub.
The hub will sorta rotate on the bearings, won't it?
LóFarkas is offline   Reply With Quote
Old 06-17-06, 07:12 PM   #11
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
awright, hmmmm, thanks all. This is not a fun problem.
peripatetic is offline   Reply With Quote
Old 06-17-06, 07:37 PM   #12
mattface
Senior Member
 
mattface's Avatar
 
Join Date: Sep 2005
Location: Montpeculiar, VT
Bikes: Soma Rush, Fuji Cross, Raleigh Technium Mtn Bike, Ross 10 speed with Shimano 600.
Posts: 3,949
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cut the spokes off the hub and use a strap wrench to grab the hub. Shants posted a pic of a strap wrench. you can find them at plumbing or auto supply stores for $10-20.
mattface is offline   Reply With Quote
Old 06-17-06, 09:51 PM   #13
sivat
Geek Extraordinaire
 
sivat's Avatar
 
Join Date: Feb 2006
Location: Long Beach, CA
Bikes: Bianchi Advantage Fixed Conversion; Specialized Stumpjumper FS Hardtail
Posts: 1,769
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by LóFarkas
The hub will sorta rotate on the bearings, won't it?
Yeah. I didn't think about that. Oops. But if you ever get a stuck cone nut... :kicking self in head:
__________________
I'd rather have a bottle in front of me than a frontal lobotomy.

Sintesi Conversion Serotta Track
sivat is offline   Reply With Quote
Old 06-17-06, 11:00 PM   #14
AfterThisNap
Taking "s" outta "Fast"
 
AfterThisNap's Avatar
 
Join Date: Dec 2005
Location: Zoo York City
Bikes:
Posts: 1,989
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
de-taco the wheel using violence, then tighten the hell out of all the spokes until you have enough tension to use tools effectively.
AfterThisNap is offline   Reply With Quote
Old 06-18-06, 12:13 AM   #15
trons
yo yo yo yo yo
 
Join Date: Nov 2005
Location: delaware
Bikes:
Posts: 2,518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
de-taco and use the rim with the cog ina vise, tension the spokes if you need to
trons is offline   Reply With Quote
Old 06-18-06, 03:24 AM   #16
MacG
don't pedal backwards...
 
MacG's Avatar
 
Join Date: Jul 2005
Location: Minneapolis
Bikes: Surly Long Haul Trucker set up for commuting and loaded touring, old Sekine road frame converted to fixed-gear, various beaters and weird bikes, waiting on the frame for my Surly Big Dummy build
Posts: 754
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've pulled freewheels off of some pretty trashed wheels in the past. Unless the wheel is way gone, you should be able to bend it back a little straighter and tension the looser spokes to be able to get the cog off.

If the problem is that the hub is flopping around inside the mess of loose spokes and you can't get any leverage with a chainwhip due to the movement, clamp the chainwhip's handle in a vice and use the bus steering wheel trick. Even if all of the spokes are loose, this will still work. The trick is converting a leverage attack (chainwhip pushed in one direction with bare hands) to a rotational attack (chainwhip secured in vice, force being applied by rotating wheel against constrained cog). You should be able to disassemble the works without having to sacrifice either the hub or the cog.

Hope this helps.
MacG is offline   Reply With Quote
Old 06-21-06, 12:06 PM   #17
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MacG
I've pulled freewheels off of some pretty trashed wheels in the past. Unless the wheel is way gone, you should be able to bend it back a little straighter and tension the looser spokes to be able to get the cog off.

If the problem is that the hub is flopping around inside the mess of loose spokes and you can't get any leverage with a chainwhip due to the movement, clamp the chainwhip's handle in a vice and use the bus steering wheel trick. Even if all of the spokes are loose, this will still work. The trick is converting a leverage attack (chainwhip pushed in one direction with bare hands) to a rotational attack (chainwhip secured in vice, force being applied by rotating wheel against constrained cog). You should be able to disassemble the works without having to sacrifice either the hub or the cog.

Hope this helps.
Thanks all for the tips. It seems that the tacoed wheel was only the beginning of my problems: my laptop died a sudden death a few days ago, and I've had little access to BF since then. Anyway, my problem is exactly as you describe it, MacG, and as soon as I get access to my super's table vise in the basement, then I will be trying all forms of solutions presented. I also noticed that my crapola Pyramid-branded chainwhip doesn't seem to get enough of a grab on the cog (it tends to fall off, and it's a 19t cog.) I'll see if I can get it to work, though. My biggest motivation at this point is to just be done with the damn rim and spokes!
peripatetic is offline   Reply With Quote
Old 06-21-06, 12:35 PM   #18
brunning
Senior Member
 
brunning's Avatar
 
Join Date: Dec 2003
Location: New York City
Bikes: 1999 Serotta Csi Custom, ~1984 Pinarello track bike
Posts: 1,519
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the old mountain bike trick to curing taco'd wheels (or at least making them straight enough to ride home on), is to lift the wheel over your head and wack it on a rock until it's straight. i'd try doing that, then tensioning the spokes enough to remove the cog.

if that fails. relace it to a junk rim (your lbs will probably supply a junked rim and spokes from their trash) and get it tight enough to do the work. should take about 20 minutes.
brunning is offline   Reply With Quote
Old 06-21-06, 01:41 PM   #19
Neist
Senior Member
 
Neist's Avatar
 
Join Date: May 2006
Bikes:
Posts: 219
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by brunning
the old mountain bike trick to curing taco'd wheels (or at least making them straight enough to ride home on), is to lift the wheel over your head and wack it on a rock until it's straight. i'd try doing that, then tensioning the spokes enough to remove the cog.
Brilliant!

Ive actually done this with a 2x4 before.
Neist is offline   Reply With Quote
Old 06-21-06, 10:18 PM   #20
OneTinSloth
(Grouchy)
 
Join Date: Mar 2003
Bikes:
Posts: 3,643
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you've de-tacoed a 2x4?!
OneTinSloth 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 08:55 PM.