Hello

Long story short, when I picked up my commuting bike from its tune-up the other day, the chain case was broken and held together with duct tape. It was fine when I dropped the bike off. The broken part was at exactly the point where the case is opened to access the chain.

The mechanic first claimed that the plastic was brittle due to the age of the bike and exposure to cold. When I challenged that, saying that the bike is less than two years old and has NOT been exposed to cold weather (I don't ride when it's really cold and I store the bike indoors), the mechanic changed their story to "plastic chain cases are just really fragile, it's a problem across the industry".

Does this sound right to any of you?

This is only the second tune-up the bike has ever gotten, so only the second time the case has ever been touched. It's a Dutch commuter bike and supposedly is designed to be exposed to all weathers.

What do you think?