I have a pretty new bike (5 years) and just recently got all the transmission very rusty (https://i.stack.imgur.com/5LmJm.jpg). Several things happened:
· Degreased it thoroughly (probably too much)
· Lubricated the chain and cassette with wax lube (brand: squirt). I've read that regular lube protects the chain from rust but I don't know about this one, couldn't find a thing.
· Did a 7-day trip with the bike leaving it most days outside, so it got exposed to some humidity but I had no option of leaving it inside.
if someone knows which one is the most probable culprit it would be helpful so I don't make the same mistake twice.
Now that it's rusty though I'm unsure about what to do. I tried to clean the rust without dissassembling the whole drivetrain but it wasn't very effective. Should I dissassemble everything and try to get the rust out or just lube it instead of using wax and use it regularly?