Clonk noise from crank

Simonwwfc

Pedelecer
Apr 14, 2020
219
36
Hi all my 2020 oxygen mk11 mtb has a clonk noise coming from the crank area I can feel it through the peddles when you do a full cycle peddle it’s only just touched over 500 miles from brand new any ideas
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
20,917
8,533
61
West Sx RH
Loose cranks, badly adjusted/tightened BB or worn BB bearings ?
 

vfr400

Esteemed Pedelecer
Jun 12, 2011
9,822
3,993
Basildon
At only 500 miles, logic says it's one of your crank bolts. Tighten it immediately.

It looks like you forgot to mention that you replaced the triple chainwheel for your single red one.
 
Last edited:

Simonwwfc

Pedelecer
Apr 14, 2020
219
36
Checked this morning to see if they was loose but tight it’s seems when you put pressure on the peddle arms the knocking clunk starts maybe bottom bracket
 

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