ATS - Speed drive is a gearing system that makes the chainring spinning at a higher rate. For instance, 38 tooth chainring with speed-drive engaged, will work like a 1.65 times larger one (63 tooth chainring).
All components are made in Taiwan and assembled in Taiwan.
(Chain driven version / Model SD165)
- Cone ring configuration, incl. crankarms and kickplates (w/o chainring nor chain guard - BCD110 spec).
- With two gears: direct drive 1:1, overdrive 1:1.65 /165% (Model SD250 can overdrive to 250%)
- Axle length : 136mm, for bottom bracket width 67 - 73mm.
Weight：Including spindle, bearings and spider, excluding chainring and cranks: 790g
(46 tooth chainring with chainring bolts: 90g, cranks 180g each).
Please compare the total weight of speed-drive with the total weight of a triple
chainring set including shifter, cable, derailleur. Example: Shimano Altus
(48/38/28 teeth): weight incl. right crankarm: 1255g
The ATS-Speed drive is manufacturing under license of Haberstock Mobility GmbH. We make this excellent bike gearing system