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hippy
Netakure
Add to this rear derailleur, chain, crankset.
Quick way to tell if it’s the BB is to put the bike on the stand and pedal forwards and backwards. If you’re ‘lucky’ you’ll be able to replicate it on the stand; it’s trickier to ID when the clicking only happens under a rider’s weight. Does the clicking happen in both directions? While moving each crank arm? What about without a chain? Any play in crank arms or excessive friction?
If it’s definitely the Bb, quick way to tell if it’s the bearings is to remove the crank arms and feel each bearing cartridge. Replace if not slippery smooth. If bearings are fine, reassemble cranks with care. If they don’t have any play, spin smoothly and still click, you’ll have to replace the bearings.
I realise that’s not exactly quick…