OK chain experts..
I have a problem with my brompton now.
I clocked about 1200-1400 km on my original brompton before deciding to swap to a bigger chainring. Since the chain has to be longer to accommodate, three chain links were added by the bike mechanic a few months back.
I cycled for another 400-500 km before i noticed the transmission gets noisy. I took out the sprockets (or cassette for non brompton peeps) and cleaned them before putting back. During the checking, i realized the chain simply couldn't sit properly inside the sprockets.
Chain, chain ring and sprockets are all 3/32.
If its derailleur problem, there should be chain rubbing and jumping between the sprockets.
Is it due to the difference in the rate of wear and tear of the original chain and the chain links?
Thanks!