Chain skipping under load after bike service

[Plummet]

2200km and the chain is skipping?
Not surprising, Sounds like a worn out drive train to me.

It also sounds like you don't have a very good bike shop. They should easily pick this up and suggest replacement.

 

[irie]

Your first mistake was taking it to a the bike store boys. You have the tools. You know what to do.

View attachment 187880

And if you don't know then learn by doing and learning from mistakes. Truth.