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

New: Take part in the June Giveaway for a Foldylock Pride bike lock by Seatylock


Horrendous noises when pedalling [Solved]
#1
I have just started hearing horrendous noises when pedalling my 7 week old Trek Powerfly 4 ebike. The sound is worse than clicking and clunking and I can’t tell exactly where it is coming from. So have uploaded a video here: https://youtu.be/G3X2tLHk4Bk. Has anyone had similar or know what if could be? I’ve not heard these types of noises before.
  Reply
#2
(04-10-2021, 03:14 AM)nimrodstu Wrote:  I have just started hearing horrendous noises when pedalling my 7 week old Trek Powerfly 4 ebike. The sound is worse than clicking and clunking and I can’t tell exactly where it is coming from. So have uploaded a video here: https://youtu.be/G3X2tLHk4Bk. Has anyone had similar or know what if could be? I’ve not heard these types of noises before.

Hello @nimrodstu !
We got a few replies from our community members via a post on Facebook.


  • John: "At 7 weeks old from new, it is likely that the rear mech will need the cable tension adjusting, (even if the gear cables a pre-stretched which I doubt very much nowadays) even a couple of mm stretch over that period of time will prevent the gears indexing correctly, with the drive train not correctly meshing with the cogs on the rear cassette... On the vast majority of rear derailleurs, there is a tension screw that the gear cable passes through, as you are "pedalling" the bike by hand, unscrew the tension screw one click at a time until the noise stops (I'd estimate for a brand new bike it may take up to one complete turn, as the cable will stretch the maximum amount during the first couple of weeks of being ridden). NB: Do not fully unscrew this tension screw as it can be a bit awkward to refit, if it is virtually all the way out you will need to reposition the gear cable, to shorten it after winding the tension screw all the way, before backing it out one complete turn, then adjust as above. Once you have stopped this noise from being heard, index through every gear (up and down again) to ensure that they can all be selected and mesh correctly, without any noise...it may take a couple of attempts to get it right, making "one click" at a time adjustments."
  • Paul: "On my Cannondale Trail neo 3. After two weeks and 66 miles had similar noises when pedalling. I discovered the 3 x T40 screws holding the motor in place had worked loose. Bought the t40 tool and torque wrench and fixed it."
  • Michael: "Sounds like it wants to switch gears. Might only need to have derailleur adjusted.??????? Just a guess."
  • Scot: "Michael, that was my guess too. Derailleur cable adjustment."
  Reply
#3
Thanks all, turns out cassette lockring was loose, tightened that up and noise gone.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
4,164
08-05-2013, 08:08 AM
Last Post: velobill
 
5,705
03-02-2013, 01:55 PM
Last Post: wd8984
 
16,599
02-21-2013, 07:28 AM
Last Post: Henry
 
7,073
10-12-2010, 07:15 AM
Last Post: KC-Steve
 
5,447
09-02-2009, 09:23 AM
Last Post: Oldwarls

Forum Jump:

[-]
10 Latest Posts
front derailleur won't go largest cog
Today 05:18 PM
Road helmet
Yesterday 02:49 PM
How to keep your bicycle safe?
06-20-2021 11:58 AM
How often do you use suspension fork loc...
06-20-2021 09:53 AM
what is good length for a folding lock?
06-20-2021 09:44 AM
Star blubike lube
06-20-2021 09:42 AM
It's here! Biking Down a Volcano at 58mp...
06-20-2021 09:28 AM
2021 Pro Road Cycling
06-20-2021 09:27 AM
Ethical Dilemma
06-18-2021 09:43 PM
Champagnolo Say None of Their Cranksets ...
06-17-2021 08:06 PM

[-]
Top 5 Posters This Month
no avatar 1. ReapThaWhirlwind
46 posts
no avatar 2. Jesper
21 posts
no avatar 3. JoJoJo
11 posts
no avatar 4. Zviedrs
10 posts
no avatar 5. ChaseCal
7 posts