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Bicycles

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5
  • Did you install it using a tool to ensure proper alignment? And have you checked for any dirt between the cranks and the BB ?
    – Burki
    Commented Mar 6 at 8:27
  • Too much preload on the NDS cap? That only needs to be just finger tight.
    – Warren Burton
    Commented Mar 6 at 8:29
  • 3
    I did clean out the dirt and it is properly aligned. I don't know what an NDS cap is. However, since posting this question I was inspecting it further and (duh!) I found that part of the grinding feeling is coming from the pedal bearings; also the chain is super stretched and not sitting on the chainring properly - so no wonder there is all this grinding! I will fix these first but that's probably it...
    – Matt
    Commented Mar 6 at 9:16
  • 2
    NDS means non-drive side. I.e. the left. It’s the cap that screws into the crank spindle, somewhat analogous to your headset top cap.
    – Weiwen Ng
    Commented Mar 6 at 11:20
  • My mistake. In this case (hollowtech) NDS preload loads the crank onto the splines but has no influence on the BB.
    – Warren Burton
    Commented Mar 7 at 15:41