I'm mostly thinking of dirt roads which have been treated with a chloride spray. And I'm being a wee bit hyperbolic with the cleanup time, but an hour ride can

I'm mostly thinking of dirt roads which have been treated with a chloride spray. And I'm being a wee bit hyperbolic with the cleanup time, but an hour ride can result in an hour+ of cleanup if I need to get the (corrosive) chloride gunk out of all the bits around brake rotors, in the cassette, and all the little spaces around the crank arms. We have a lot of very sandy soil around here as well, so if it's really wet the dirt absolutely tears up brake pads. (That's a worst case.) A particularly pointed example is the Iceman Cometh Challenge bike race. It's 2-3 hours for most people, but after the bad-conditions years it was common for folks to be replacing brake pads, jockey wheels, and aluminum chainrings. Plus the added suspension seal wear because for most of the event the seals were working hard clearing gunk from the stanchions. EDIT: Or Barry-Roubaix, a gravel race in Southwest Michigan (US) that's on similar roads. Typically a 2 hour race for the most popular distance, but on some of the wet years it absolutely trashed bikes due to all the abrasive muck being thrown around.