A rumbling or lumpiness doesn’t sound to me like worn components; sounds more like chain too tight or wildly offset chainline. That said; there’s no WAY your chain should be dropping off! That could be fatal riding fixed…
I run my chains pretty loose but still only get about 1000 miles out of them. Less in the winter. A tenner every couple of months doesn’t seem like a big deal and my chainrings and sprockets on my main bikes have never needed replacing and still look almost new.
A rumbling or lumpiness doesn’t sound to me like worn components; sounds more like chain too tight or wildly offset chainline. That said; there’s no WAY your chain should be dropping off! That could be fatal riding fixed…
I run my chains pretty loose but still only get about 1000 miles out of them. Less in the winter. A tenner every couple of months doesn’t seem like a big deal and my chainrings and sprockets on my main bikes have never needed replacing and still look almost new.