BB problem, I think!

John · 05-20-2010, 11:42 AM

Hi all, I'm new on here so be kind please. I've noticed I'm hearing a very slight clunking noise when left pedal goes down. Any ideas? Thought it might have been BB lockring but seems tight to me. Bike only 6 months old & don't want to go to shop as want to maintain bike myself.

DaveM · 05-20-2010, 04:49 PM

First check:
- pedals tight to crank arms
- crank arms tight to BB spindle
- crank arms not hitting anything

Then do the pedals spin smoothly? If you slide the chain off the chainrings and spin the cranks, does the BB feel smooth?

10 Latest Posts
Are you mainly into Mountain Biking, Roa... Yesterday 11:08 AM
Are 26" really dying out? Yesterday 11:02 AM
Wanted \| Magura Louse or Julie rear Yesterday 04:03 AM
Hatch Chiles Rule! 11-09-2026 04:56 PM
Should eBikers have to get an eBike lice... 11-09-2026 05:21 AM
How Bad Are E-bikes By You? 11-08-2026 10:29 PM
Shortness of breath. 11-08-2026 09:56 PM
Hello All 11-06-2026 09:03 AM
I don't usually wear a bike helmet. Does... 11-06-2026 02:48 AM
Chain skips under heavy load when pedall... 11-06-2026 02:44 AM

Join BikeRide on Strava

Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom