the drive train. it looks a bit … used.
i’m not complaining. the chainring, the chain and the cassette are actually consumables, I guess with the kind of power my little legs put out they are just wearing really slowly, but given most parts are probably 2 years old it’s ok to see signs of extended use.
i already have the chain and a chainring was on order as well. looking at the cassette i guess that is up for replacement, too. best not use the new components with old parts, that will just reduce their lifespan.