I've personally had so many questions about the whole weight issue between internal and external gears that I thought it would be helpful to start a thread where people could actually put down some standard weight differences in hubs. All I could find was for some of the Shimano hubs. If anyone knows the standard weights on the SRAM hubs, please post.

Hub

Nexus 8 speed: 1750 grams: 3.85 lb (Red Band)
Nexus 7 speed: 1465 grams: 3.23 lb
Nexus 3 speed: 1120 grams: 2.47 lb

Ultegra: 347grams: .77 lb
Dura Ace: 264grams: .58 lb

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