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

Mysterious 'grease' under BB

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.

Mysterious 'grease' under BB

Old 06-07-23, 11:28 AM
  #1  
Full Member
Thread Starter
 
epnnf's Avatar
 
Join Date: Jun 2008
Location: SW Ohio
Posts: 405

Bikes: 2016 Masi strada vita due, 2019 Kona Dew Plus

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 268 Post(s)
Liked 80 Times in 55 Posts
Mysterious 'grease' under BB



See, on the plastic thing w/grooves? It tends to make shifting sluggish. Where did it come from? Been appearing for cpl months; after a ride. Fix is easy- degreaser > toothbrush > rinse > dry. Never happened before on any bike. Happens mostly on the Masi, shown, but also on the Kona.
epnnf is offline  
Old 06-07-23, 12:11 PM
  #2  
Senior Member
 
maddog34's Avatar
 
Join Date: Jul 2015
Location: NW Oregon
Posts: 3,013

Bikes: !982 Trek 930R Custom, Diamondback ascent with SERIOUS updates, Fuji Team Pro CF and a '09 Comencal Meta 5.5

Mentioned: 15 Post(s)
Tagged: 1 Thread(s)
Quoted: 1314 Post(s)
Liked 763 Times in 553 Posts
"Never happened before on any bike."

wanna bet on that statement?

possible sources? An over-greased Seat Post... an over-greased Headset... and, the Most Likely, an over-greased Bottom Bracket.

keep wiping and cleaning.. cleaning a bike by hand with a rag is the best way to inspect a bike for problems... and don't forget to wipe each spoke too.. it's a great way to feel a loose spoke before it causes a bigger problem.....
maddog34 is offline  
Likes For maddog34:
Old 06-07-23, 12:17 PM
  #3  
Full Member
Thread Starter
 
epnnf's Avatar
 
Join Date: Jun 2008
Location: SW Ohio
Posts: 405

Bikes: 2016 Masi strada vita due, 2019 Kona Dew Plus

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 268 Post(s)
Liked 80 Times in 55 Posts
Yea, I thought about over greased BB, but the BB has been there for years; this problem has only been going on for cpl months.
Forgot to mention, theres a lot of crud coming down the DT- like from the water bottle. So now, I am extra vigilant about preventing the bottle from leaking- doesnt seem to make any difference.
epnnf is offline  
Old 06-07-23, 12:40 PM
  #4  
I'm good to go!
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 15,331

Bikes: Tarmac Disc Comp Di2 - 2020

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 6377 Post(s)
Liked 4,975 Times in 3,423 Posts
Check your plastic thingy with the grooves (BB cable guide) and make sure the cables aren't sawing into it. The grease and/or oil is probably coming from as previously suggested by another and likely it's just attracting grit from the road which is what really is making the shifting sluggish in the narrow grove they've sawed for themselve.

The plastic thingy (BB cable guide) only cost me $2.00 last time I needed one.

If it is in fact something from your bottles, then maybe it's the sugar in it getting sticky as it dries. I constantly am cleaning my dried hydration mix and salt from my sweat off all the tubes of my bike and the BB.

Last edited by Iride01; 06-07-23 at 12:44 PM.
Iride01 is offline  
Likes For Iride01:
Old 06-07-23, 01:24 PM
  #5  
Senior Member
 
soyabean's Avatar
 
Join Date: Feb 2022
Location: GMT-5
Posts: 988
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 573 Post(s)
Liked 433 Times in 286 Posts
If the OP is complaining about this, it means they aren't washing their bike enough, ever.

I mean, is it even grease at all?

I was components on my bikes religously.

Old toothbrushes are my friends.
soyabean is offline  
Old 06-08-23, 09:15 AM
  #6  
Full Member
 
Join Date: Jul 2022
Location: Illinois
Posts: 349
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Liked 297 Times in 157 Posts
Remove the fastener, clean the threads, apply thread sealant, reinstall.

Last edited by streetsurfer; 07-05-23 at 05:04 PM.
streetsurfer is offline  
Old 06-08-23, 09:42 AM
  #7  
Senior Member
 
curbtender's Avatar
 
Join Date: Mar 2007
Location: SF Bay Area, East bay
Posts: 7,771

Bikes: Miyata 618 GT, Marinoni, Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball

Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 1640 Post(s)
Liked 2,746 Times in 1,275 Posts
You use an energy drink? I wouldn't think grease would make it sluggish. I'm going with a leaky water bottle.
curbtender is offline  
Old 06-08-23, 10:06 AM
  #8  
Senior Member
 
trailangel's Avatar
 
Join Date: Feb 2014
Location: Pasadena, CA
Posts: 4,848

Bikes: Schwinn Varsity

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 1931 Post(s)
Liked 742 Times in 422 Posts
Huh? It's road grit. Wipe it off. I would be more concerned about the clear plastic "thingy" on the downtube.
trailangel is offline  
Old 06-08-23, 10:41 AM
  #9  
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 6,031

Bikes: 1989 Cinelli Supercorsa

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 3652 Post(s)
Liked 3,089 Times in 1,862 Posts
You're got a lot going on with that down tube. Are you sure something else isn't interfering with the cables and causing the sluggish shifting?
smd4 is offline  

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 -

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