ah… my favourite subject, i know this relates to the 8 speed but this is what i posted on an earlier alfine thread.
Stu McGroo – as there's much speculation and not much in the way of facts about the extra weight of an alfine bike over conventional 3×9 set-up i decided to do some digging.
i've just had an email from charge bikes and it says,
"There is virtually no difference in overall weight (less than 100g from memory), between a duster 8 and equivalent priced duster with conventional gearing."
obviously there is a rearward weight shift with the alfine but this answers any overall weight questions.