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Occasional slight knocking noise from rear on Mini 4

Started by Radiator, October 11, 2021, 12:56:35 AM

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Radiator

Hi,
Thanks for this site. Very helpful.
Took delivery of a Mini 4 a couple of weeks ago. Now about 200km on the odo
On occasions I get a slight dull knocking noise that seems to come from the rear when I am pedalling uphill in time with the wheel / crank rotation. Its fairly rare and for some reason seems to happen mainly in 3rd gear. It only lasts for a few seconds usually. It seems to subside when the gradient changes or maybe when I change gear / PAS. Any idea what it might be? I have heard that Planetary gears can sometimes be a bit clunky.
Thanks
R.