Hanger
Bear in mind, they don't tend to just up and break.
I bent mine twice by just letting the bike fall over while stationary.
It's straightening them afterwards that can increase the risk.
I needed a hanger straightened and bike store told me "it may break".
I told them, I don't care, I've a spare hanger in my pocket.
Mechanic smiles and proudly states "then this one will never break !"
Mine was unique not only to the Brand and Bike, but also that that year.
If your hanger is in any way unique, bring one along. You won't need it.
Barry