I’m wondering if you can help me identify a noise coming from my bike.
It seems to be most noticeable when the bike is on the turbo trainer indoors. What I’ve noticed is a knocking sound, which you can hear in the clip, that happens when I apply pressure to the handlebars. If I’m sitting upright, there’s no noise, but as soon as I lean forward and put weight on the bars, the noise begins.
Any ideas on what could be causing this?
This is the waveform for the sound file, showing in the first 10 seconds or so where I’m sat upright and spinning up the pedals. Then I lean forwards, drop a gear, and it begins.
This only seems to happen when I put weight on the right side of the bike. While I’m sitting in the saddle and leaning forward, if my weight is either distributed centrally or more to the right, especially on the right handlebar (whether in the middle or fully out on the drop), the noise occurs.
I’ve also noticed that this noise only happens on the downstroke of my right foot. It seems potentially related to the right pedal, as the noise occurs when the pedal is at the very bottom of the downstroke.
One thing to note is that I don’t think I’ve heard this noise outdoors, though I can’t guarantee that. Unfortunately, due to recent injuries, I won’t be able to head outdoors anytime soon to validate this.
Any thoughts or suggestions on what it might be and how to fix it would be very gratefully received.