Author Topic: SRAM Dual Drive 24 and 27 speed rear hubs  (Read 3210 times)

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Offline ducnut

SRAM Dual Drive 24 and 27 speed rear hubs
« on: January 13, 2011, 11:06:36 pm »
I just stumbled onto this rear hub. I thought it might be of value to others.

Dual Drive 24
http://www.sram.com/sram/trekking-comfort/products/dual-drive-24

Dual Drive 27
http://www.sram.com/sram/trekking-comfort/products/dual-drive-27



Offline DaveB

Re: SRAM Dual Drive 24 and 27 speed rear hubs
« Reply #1 on: January 14, 2011, 10:39:42 am »
Sachs (now owned by SRAM) used to have a "3x7" hub that combined a 3-speed IGH with a 7-speed cassette.  Bike Friday used them on several models as it allowed the equivalent of a triple crank with only one chainring.

Lucky13

  • Guest
Re: SRAM Dual Drive 24 and 27 speed rear hubs
« Reply #2 on: January 15, 2011, 07:56:24 am »
The Dual Drive hub has been around for quite a while now. It's a popular choice for small wheel bikes, like folders. My Friday has been running such a hub since day one - with no problems. It has a gear range of approx. 19-100 inches.

The hub provides three different gear ranges and combined with a 9-speed cassette, gives three different "sets" of nine gears. As mentioned, the bike needs only a single chainring and no front changer.

One of the advantages of the Dual Drive is that it allows one to switch between the three gear ranges at any time - even while stopped.

The hub does require a few non-standard parts. Anyone riding away from home should consider bringing along spares - a shift pin, locking washers for the axle bolts and maybe even a spare click-box.