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


Go Back   > >

Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-17-12, 02:38 PM   #1
stapfam
Time for a change.
Thread Starter
 
stapfam's Avatar
 
Join Date: Jan 2004
Location: 6 miles inland from the coast of Sussex, in the South East of England
Bikes: Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.
Posts: 19,915
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Nexus hubs

I May be acquiring a hybrid bike with an 8 speed Nexus hub. This bike has not been maintained throughout its life and although the bike is not a major problem-I have a few worries about the Nexus hub. It looks as though the bike has not seen any oil for a long time. Chain- and probably sprockets- is completely worn but the owner says he can only get 5 of the 8 gears. Haven't checked out by riding it but on the stand I can get all 8 gears.

So do these hubs need lubrication?- where? and what oil? That is my main concern as the rear wheel is covered in a rust film that looks as though it got there by oil that has dried out. There is NO oil film anywhere on the bike- let alone around that hub.

Don't want to put any work into the bike if the hub has had it.
__________________
How long was I in the army? Five foot seven.


Spike Milligan
stapfam is offline   Reply With Quote
Old 04-17-12, 03:38 PM   #2
gtragitt
Senior Member
 
Join Date: Aug 2009
Location: Houston, TX - Energy corridor
Bikes: 2011 Trek SOHO Deluxe, and 2010 Specialized Roubaix Expert
Posts: 868
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They require oil. I would suggest replacement of the oil. I will look for a link detailing the procedure.
gtragitt is offline   Reply With Quote
Old 04-17-12, 03:51 PM   #3
gtragitt
Senior Member
 
Join Date: Aug 2009
Location: Houston, TX - Energy corridor
Bikes: 2011 Trek SOHO Deluxe, and 2010 Specialized Roubaix Expert
Posts: 868
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I must have a hazy memory. The information I can now find indicates grease not oil.

http://sheldonbrown.com/nexus-mech.html
gtragitt is offline   Reply With Quote
Old 04-17-12, 03:52 PM   #4
choteau
Senior Member
 
Join Date: Dec 2008
Location: Oregon
Bikes:
Posts: 366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Try this link. http://sheldonbrown.com/nexus8/ Tim
choteau is offline   Reply With Quote
Old 04-17-12, 03:56 PM   #5
choteau
Senior Member
 
Join Date: Dec 2008
Location: Oregon
Bikes:
Posts: 366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This thread has info
Shimano Nexus internal Hub reliability 8-speed
choteau is offline   Reply With Quote
Old 04-17-12, 05:09 PM   #6
gtragitt
Senior Member
 
Join Date: Aug 2009
Location: Houston, TX - Energy corridor
Bikes: 2011 Trek SOHO Deluxe, and 2010 Specialized Roubaix Expert
Posts: 868
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks choteau. I guess I did remember correctly about oil.
gtragitt is offline   Reply With Quote
Old 04-17-12, 05:54 PM   #7
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Bikes:
Posts: 6,059
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
These hubs are or were grease packed when new, but Shimano has recognized that oil lubrication delivers superior performance and durability. I attended a Shimano service clinic where the oil dip procedure was demonstrated, but of course they recommend their own (very expensive) oil.
Many people have reported good results using good old garden variety ATF.
I'm running a long term test case running an Alfine hub, essentially the same animal as your Nexus on ATF. The owner of this hub rides about 3,000 km per year. The first oil dip was done at 3,000 km, the second at 6,000. I anticipate doing the third oiling this fall at 9,000 km.
Here's a video I made while doing the second oiling. The process for your Nexus is identical with the exception that the drive side dust cover is pried out, it is not screwed on.
http://www.youtube.com/watch?v=lFOMD2q5-o4
I would also add that shifting issues with these hubs are almost always related to poor cable routing, or poor cable condition. I sold a ton of these hubs in my shop, and resolved shifting issues externally 100% of the time.
__________________
Gearhubs demystified and other cool stuff.


WANTED: Dead or broken gearhubs for failure analysis.

Like the shop

Last edited by Dan Burkhart; 04-17-12 at 06:00 PM.
Dan Burkhart 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 09:01 AM.