Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.


Bottom Bracket Grinding Sound
#1
Recently I did a 350 mile, 4 day bike ride and half way through I started to here a clicking sound coming from my bottom bracket. We had mechanics on the ride and they mentioned it might be the retainer clip in the bracket making the sound but they didn’t have the tools to fix it. Anyways I kept riding the next few days and now it’s a very loud grinding sound when I pedal. Any idea what it could be? I have a Trek and it’s not even a year old with about 1000 miles on it.

  Reply
#2
Do you know if it's a sealed bottom bracket? Also, try tugging on the crank arms to see if the spindle moves in the shell. It sounds like bearings to me.

  Reply
#3
It sounds like the bearings for sure. I would <a href="http://bikeride.com/bottom-bracket/">crack it open</a> and have a look.

  Reply
#4
Sounds like loose bottom bracket at first
then cracked bearings if its not sealed

basically renew all BB
  Reply
#5
It does sounds like your bearing. Let us know what you find out.
My dad always told me a Sledge a matic can fix any thing.
  Reply
#6
Yeah it does sound like bearings. Not to sure of Trek's Bottom Bracket design but definitely worth an overhaul.
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
New to the Forum - Introduction
Today 05:38 PM
Would you like a pizza after cycling?
Today 02:10 AM
Hardtail as only bike?
Yesterday 05:23 PM
Spoke Count Preference
Yesterday 09:17 AM
Pros & Cons of presta valve vs schrader ...
Yesterday 03:34 AM
Are you mainly into Mountain Biking, Roa...
Yesterday 02:20 AM
New around here
07-11-2026 10:53 AM
Favorite MTB brand?
07-10-2026 03:16 AM
29"front & 26" rear? Thoughts?
07-10-2026 03:13 AM
suspicious broken part after service--is...
07-09-2026 02:45 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Flowrider
27 posts
no avatar 2. meamoantonio
17 posts
no avatar 3. GirishH
17 posts
no avatar 4. ReapThaWhirlwind
15 posts
no avatar 5. Mr. Beanz
13 posts