Hollowtech II Bottom Bracket Lifespan...

I've just had to replace the bottom bracket on my 'summer' bike. It's spent the last three rides pinging and clicking every time I stand on the pedals.
It's a Dura Ace 9100 and I would guestimate it's done about 2000 miles.
The bike's fixed gear so admittedly the BB probably has a harder time but this still seems like a bit of a short lifespan. Prior to this I've only really used cup and cone for any length of time which with yearly maintenance outlasted all the bikes they were fitted to.
This bike never gets jet washed but obvously living in England even the odd Summer ride can result in unexpectedly getting absolutely soaked from time to time.
Wondering what peoples experiences are here of outboard BB's? Have they really become such a disposable commodity?

Wondering what peoples experiences are here of outboard BB's? Have they really become such a disposable commodity?

yes

also they rely on the frame being squared up; any deviation from absolutely bang on reduces their lifespan.

The good news is they are easy to remove / replace. Or should be. YMMV.

I noticed on a bike with mudguards that after I lost the mudflap and water spray hit the bottom bracket it got trashed pretty quickly. Kept dry it lasted for years.

it's usually the non-drive side that goes first. the drive side is more protected from general crap and rain by the chainset whereas the non-drive side allows a lot more water ingress.

2,000 miles is about right. go for a cheaper, lower spec model say 105 next time. it won't make a hell of a lot of difference in performance

I usually get at least double, more like triple the mileage out of similar Shimano BBs, though I've been known to cope with a slightly gratey one for a while. The one on my off road bike (gravel/CX) is in its 4,500th mile & still spins lovely somehow.

Thanks for the reassurance. Still irked that they should fail so soon. I have the exact same one on my winter bike which is about the same age and that still seems fine!?!
I've put a Rotor ceramic in for now; not for the 'mad wattage gains' of course; just interested to see if it'll last any longer.

Wouldn't be a better move to put a 105 or equivalent instead of a ceramic one. Pretty sure it will be a lot better £ per mile.