SRAM i-Motion
The SRAM i-Motion series of products is a sport, urban, and trekking oriented product series developed and manufactured by SRAM Corporation. Branded i-Motion are internally geared hubs, shift levers, and dynamo hubs. Related to the i-Motion series are also changeable free or fixed single speed hubs, hybrid epicyclic and derailleur gear hubs, and hydraulic disc brakes.[1] The i-Motion series of products were developed at SRAMs Schweinfurt R&D and manufacturing plant in Germany, formerly of Sachs.
Products
i-Motion 9 - This hub gear has nine speeds in percentage increments of 14,17,17...17,14, offering an overall range of 340%. The coaster-brake version weighs 2400 grams, while the non-brake integrated versions weigh just under 2000 grams. This product was discontinued in 2012, and replaced with the SRAM G8.
i-Motion 3 - The 3 has similar gear ratios as the Shimano Nexus three speed hubs, 36% intervals and an overall range of 186%.