Andy R wrote:
I'm using an Alfine 8 on my Hummingbird with Middleburn RS7 cranks (square taper) and Uno chainring. With the Alfine sprocket fitted to give the wider chainline (ie dishing inwards) the chainline is perfect with a 113mm BB (SKF 600 series) which is 47.5mm.
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Thanks Andy. If I went with a shorter spindle then, in theory, I wouldn't need to turn the sprocket over but I'd have to look for something like a 103mm bb which are available. Of course I'd have to consider the chain ring clearance, any idea how tight this would be on the Hummingbird?
I couldn't get away with a shorter BB than 113mm, not an SKF anyway. As it is, there is only about 1mm clearance between the drive side bearing and the inner face of the crank, chainring clearance with a 32 tooth Uno is about (well exactly, as I've just measured it) 6.5mm.
Turn the sprocket to give you the better chainline is my suggestion.