Originally Posted by
Joshua A.C. New
Zip ties will eventually break. They get very, very brittle from UV and ozone I think, until they snap like twigs. It takes several months at least, but if it's in a non-critical place (like a fender) then whatever.
This is not always true. Black zip ties tend to be UV resistent, but its good to double check. Usually for bike related things (computers, cage adaptors, fenders, etc) black should be used.