Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

single speed (flip/flop) hub maintenance

Notices
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.

single speed (flip/flop) hub maintenance

Old 08-26-13, 03:44 PM
  #1  
Newbie
Thread Starter
 
Join Date: May 2011
Posts: 3
Likes: 0
Liked 0 Times in 0 Posts
single speed (flip/flop) hub maintenance

So I just purchased my first single speed bike since my Schwinn Stingray - 30+ years riding gears. The bike is used and needs a little maintenance.

It has Suzue Fixed/Free Promax Track Hub with a Shimano sf-1200 freewheel. I've only used the freewheel side.

When I spin the cranks in reverse, the cranks and the freewheel seem to spin fine. With the rear wheel off the ground, when I spin the wheel there is considerable drag. The wheel only makes a few rotations. Also, if I don't hold onto the cranks, they tend to spin with the wheel - they don't "coast" properly. I believe the hub is positioned for correct chain tension.

Do I just need to repack the hub?
Does the freewheel also need maintenance?
Does anything need to be replaced?
Beyond grease, should I have any other parts on hand before I get started?

I have repacked hubs on geared bikes once or twice, so I'm not operating with complete ignorance. Thanks for the input.
kwjmpls is offline  
Old 08-26-13, 04:05 PM
  #2  
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,522

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Liked 11 Times in 11 Posts
Think about what you are observing - the wheel stops soon when freewheeling and the pedals turn when freewheeling. The only thing that can drive the pedals forward is friction between the hub and freewheel driving the chain, and the same resistance that causes the freewheel to travel with the hub would slow down the hub if you hold the pedals in place. So that means the freewheel is binding. That could be due to a problem with the freewheel, lack of freewheel lubrication OR too tight a chain. The chain should have no tension at it's loosest point. The hub bearings are not a factor in what you describe, but no guarantee they don't need to be adjusted.

Last edited by cny-bikeman; 08-26-13 at 04:10 PM.
cny-bikeman is offline  
Old 08-26-13, 04:34 PM
  #3  
Senior Member
 
zukahn1's Avatar
 
Join Date: Oct 2011
Location: Fairplay Co
Posts: 9,590

Bikes: Current 79 Nishiki Custum Sport, Jeunet 620, notable previous bikes P.K. Ripper loop tail, Kawahara Laser Lite, Paramount Track full chrome, Raliegh Internatioanl, Motobecan Super Mirage. 59 Crown royak 3 speed

Liked 1,862 Times in 655 Posts
These hubs have very nice sealed bearings so the hub should be fine. The issue is either with your freewheel or chain tension.
zukahn1 is offline  
Old 08-26-13, 04:39 PM
  #4  
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,954
Liked 92 Times in 75 Posts
+1 Freewheel or chain tension issue. Make sure you get the chain tension right (there should be none!) then drip some oil into the freewheel and see if that makes it coast properly. If not you can try removing the freewheel, flushing it with solvent, and lubing with oil. If all else fails get a new freewheel, good ones are less than $20.
FastJake is offline  
Old 08-26-13, 04:50 PM
  #5  
Senior Member
 
surreal's Avatar
 
Join Date: Mar 2002
Location: NJ
Posts: 3,084
Likes: 0
Liked 5 Times in 4 Posts
The posts above are correct; the order-of-operations from here are: check the chain and loosen it if necessary. If that doesn't work, identify your freewheel. Some ppl will use pin spanners to open up and relube the freewheel, check the pawls/etc-- most freewheels have zillions of tiny bits in them, and are a hassle to take apart, clean, check, and reassemble. Others just leave 'em closed up and soak 'em down with a degreaser for a while, then drip some heavier oil in the gaps at the outer side of the freewheel. Me, unless it's a White, I tend to pull em off, toss them, and get a new freewheel. If i like the gear ratio, I prefer to replace it with a White.

As for whether or not the hubs bearings need servicing, well, you'll want to check that as well.
surreal is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
abrogard
Bicycle Mechanics
2
11-24-15 07:01 AM
icepik1234
Singlespeed & Fixed Gear
20
05-14-15 10:32 AM
JReade
Bicycle Mechanics
7
01-19-11 01:42 AM
cynergy
Bicycle Mechanics
4
10-15-10 08:48 PM
eddie87
Bicycle Mechanics
10
06-12-10 11:21 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.