Originally Posted by juan162
Keep in mind that internally geared hubs don't need deraillers or multi cog cassettes. A cassette and derailleur will generally add anyware from 1-1.5 lbs combined depending on the quality of said components. For example, a 10 speed ultegra setup in the rear would run you a little less than 1.75 lbs total (That includes the hub, cassette, and derailleur). That's a savings of more than 2 lbs over a Nexus Red Band 8 speed! That may not be a big deal to some, but that definitely makes me stop and think.
I am personally interested in the weight of the sram dual drive hubs.
Juan
Weight is only one of the problems. The major issue with the Nexus 7 or AW-3 is the inefficiency from the internals. This makes it feel like the hub is much heavier than the actual weight and the SRAM dual drive when shifted in 3rd gear is very inefficient.
I also happen to believe when the weight is all shifted to the rear hub, it feels like you're carrying an additional two water bottles!