I was watching The Man Who Cycled The Americas on iPlayer last night, and the narrator mentioned as he was getting the BB replaced that the bearings have an expected life of around 1600 miles.
My BB has started clicking a bit, so out of curiosity I totalled up the (mostly commuting) miles and got to about 1500, which sounds about right! (or not when you compare it to how long stuff lasts on a car - can you imagine if something wore out in less than 2k on a car?)
So does anyone know the estimated lifespans of other components? I'm thinking tyres, pivot bearings, pedals, chain and cassette etc. I know these are all dependent on riding conditions but it would be interesting to hear some ballpark figures
Does anyone keep track of this sort of stuff? I think there was a mention on here recently of someone keeping a repair logbook...

