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changes in pressure can cause them to leak. They don't have a breather hole. Or rather they do but oil leaves with the air.
That could be a killer on TCR. There will be huge air pressure changes due to:-
- A flight or two to get to the start (assuming not travelling on Eurostar)
- Altitude changes (multiple changes from 0m to ~2500m and back down again, etc)
- Temperature (from 5C to 50C in the sun)
I'd also worry about what also gets dragged back in through the breather hole.
- A flight or two to get to the start (assuming not travelling on Eurostar)
Greenbank-
Yeah. There's no designated breather hole. There is enough of a gap somewhere for stuff to go in and out.
Bit like my lefty 2.0. Which is kinda worrying for the same reason!
In Roger's case I'd guess he either lost the Alfine lottery and it was duff from the factory or yeah, it barfed the oil out somewhere. You'd probably get too tired to back off properly when shifting too, so I imagine the guts suffered as well.
You'd need a lot of experience with the hub to make the distance I reckon, but if you rode one which had 800 trouble free miles or so on it, you'd get there if you knew what you were doing.
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I'd also worry about what also gets dragged back in through the breather hole.
Despair and regret.
Howard
TM
From reading around
That said a lot of people seem to have got good mileage from them. Shrug.