Trial and error.
It could be anything from the general area if you haven't sourced it yet. Wouldn't be great if you dropped cash on a new crankset only to find it was the pedals.
Check for dirt on chain, chain ware, play in pedals, dirt on BB spindle, loose bolts, possibly a crack in the frame.
A good cleaning an a new layer of grease may help.
Did you give your bike a good going over after the mud, rain, snow (also grit) of the winter?
Trial and error.
It could be anything from the general area if you haven't sourced it yet. Wouldn't be great if you dropped cash on a new crankset only to find it was the pedals.
Check for dirt on chain, chain ware, play in pedals, dirt on BB spindle, loose bolts, possibly a crack in the frame.
A good cleaning an a new layer of grease may help.
Did you give your bike a good going over after the mud, rain, snow (also grit) of the winter?