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 04-05-11, 11:13 PM   #1
tompt
Junior Member
Thread Starter
 
Join Date: Jul 2007
Location: Anchorage, AK
Bikes:
Posts: 21
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jockey wheels, do they matter?

I bought a set of sealed bearing jockey wheels last year. Riding through the winter, the lower wheel has seized. I'm not sure what to do. I don't think the bearings lasted as long as the bushings in the stock Shimano jockey wheels.

Should I try a little fancier jockey wheels, or are the bushings on stock Shimano wheels the best you can do in nasty conditions?

Really, do the jockey wheels matter, or are they all about the same?
tompt is offline   Reply With Quote
Old 04-05-11, 11:17 PM   #2
Sixty Fiver
Bicycle Repair Man !!!
 
Sixty Fiver's Avatar
 
Join Date: Sep 2007
Location: YEG
Bikes: See my sig...
Posts: 27,264
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
It would appear that the sealed bearings were not as well sealed as one would like.

The stock bushings in most derailleurs handle extreme weather just fine.. the sealed bearing models and after market jockey wheels do make things pretty smooth but so does keeping the stock pulleys clean and lubed.

Suntour jockey wheels were very well made and can be used to replace some other jockey wheels... they do not wear out as quickly as Shimano jockey wheels either.
Sixty Fiver is offline   Reply With Quote
Old 04-05-11, 11:18 PM   #3
Captain Blight
Senior Member
 
Captain Blight's Avatar
 
Join Date: Oct 2009
Location: Minneapolis
Bikes: -1973 Motobecane Mirage -197? Velosolex L'Etoile -'71 Raleigh Super Course
Posts: 2,473
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
to my mind they are all about the same although the old Huret untoothed, round pulleys are noticeably quieter than anything "modern." Certainly the sealed bearings weigh a good bit more, though it's a difference that's less than a good swallow of water.
Captain Blight is offline   Reply With Quote
Old 04-05-11, 11:34 PM   #4
Sixty Fiver
Bicycle Repair Man !!!
 
Sixty Fiver's Avatar
 
Join Date: Sep 2007
Location: YEG
Bikes: See my sig...
Posts: 27,264
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
The old Huret pulleys have non sealed bearings in them and when they are clean and the pre-load is right they are very very smooth.
Sixty Fiver is offline   Reply With Quote
Old 04-06-11, 06:44 AM   #5
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: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
The jockey (upper) pulley on a modern indexing rear derailleur has to "float" sideways a little to make shifting quick and quiet so just any pulley won't do.

Early replacement pulleys were fixed and provided touchy and unreliable shifting when substituted for the OEM ones. I expect current aftermarket pulleys have been redesigned to provide the needed float.

That said, the factory pulleys work so well and last so long I don't see any use spending more money to replace them.
HillRider is offline   Reply With Quote
Old 04-06-11, 07:29 AM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,423
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 656 Post(s)
In Anchorage AK, as a commuter, in the winter , a bushing type pulley
may well do better .

yes specifically, Shimano Indexing requires float ,
so near miss aligned locations are adequate.

20 Years Ago , I got some Carmichael sealed bearing Offered is aluminum and Ti.
the float on those came thru the bushing the bearing sat on.

Have you popped the plastic seal out and cleaned
and re lubricated the bearings in the cartridge?

Last edited by fietsbob; 04-06-11 at 07:45 AM.
fietsbob is online now   Reply With Quote
Old 04-06-11, 07:34 AM   #7
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,951
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Quote:
Originally Posted by HillRider View Post
The jockey (upper) pulley on a modern indexing rear derailleur has to "float" sideways a little to make shifting quick and quiet so just any pulley won't do.
My old fashioned 2011 SRAM Red and Force jockey wheels have no significant float. My modern 12, 10, and 6 year old Shimano upper jockey wheels do.
Looigi is offline   Reply With Quote
Old 04-06-11, 10:10 AM   #8
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: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Quote:
Originally Posted by Looigi View Post
My old fashioned 2011 SRAM Red and Force jockey wheels have no significant float. My modern 12, 10, and 6 year old Shimano upper jockey wheels do.
I'm surprised to hear that about SRAM but both Shimano and Campy provide float in their jockey pulleys.
HillRider is offline   Reply With Quote
Old 04-06-11, 10:24 AM   #9
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,967
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 363 Post(s)
There's a common misconception about sealed bearings. Most of the commercial sealed bearings used in the bike trade are only sealed to the standards applicable in the world of electric motors. the seals are intended to keep grease in and dust out.

These seals aren't intended as hydraulic shaft seals and will admit water, especially sprayed water. The irony is that when it comes to water they do a far better job sealing it in than out. For a light application like a derailleur, there's zero benefit to ball bearings, compared to brass or bronze bushings. There's a tiny reduction if friction, but since the load is only that of the RD cage spring, the total friction involved is miniscule to begin with.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now   Reply With Quote
Old 04-06-11, 10:36 AM   #10
LesterOfPuppets
cowboy, steel horse, etc
 
LesterOfPuppets's Avatar
 
Join Date: Sep 2008
Location: Rock Springs, WY
Bikes: My War
Posts: 26,860
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 304 Post(s)
Quote:
Originally Posted by HillRider View Post
I'm surprised to hear that about SRAM but both Shimano and Campy provide float in their jockey pulleys.
I think some Suntour jockey pulleys were float-free also.
LesterOfPuppets is offline   Reply With Quote
Old 04-06-11, 10:40 AM   #11
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: 28,917
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Quote:
Originally Posted by LesterOfPuppets View Post
I think some Suntour jockey pulleys were float-free also.
Their pre-indexing pulleys certainly didn't float but I don't recall what they used after they introduced indexing.
HillRider is offline   Reply With Quote
Old 04-06-11, 11:00 AM   #12
LesterOfPuppets
cowboy, steel horse, etc
 
LesterOfPuppets's Avatar
 
Join Date: Sep 2008
Location: Rock Springs, WY
Bikes: My War
Posts: 26,860
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 304 Post(s)
It seems to me some of their indexed stuff had float and some didn't. Unfortunately I just got rid of an XCE 6sp. rear derailer. I'll check out the XC-Pro 7-sp when I get home though.
LesterOfPuppets is offline   Reply With Quote
Old 04-06-11, 09:49 PM   #13
LesterOfPuppets
cowboy, steel horse, etc
 
LesterOfPuppets's Avatar
 
Join Date: Sep 2008
Location: Rock Springs, WY
Bikes: My War
Posts: 26,860
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 304 Post(s)
UPDATE: My Suntour XC-Pro 7-speed rear derailers have absolutely no play in the jockey wheels.
LesterOfPuppets 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 10:52 AM.