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.

Specification

(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

Features

• Planetary gearing system with two switch positions: direct drive 1:1, overdrive 1:1.65
• Direct shifting via push bttons or "easy-shift" - levers on both ends of the spindle. No cables, no rods.
• Gear housing : Corrosion resistant, completely encased and protected against dust and spray water.
• Axle: Rides on (replaceable) cartridge bearings. You can expect a lifetime of more than 20'000 miles for the bearings and much more for the speed-drive.
  
• Belt drive or chain drive system available.

ATS speed drive will not be shipping to US or EU address, please be noted!

Please Drop us a line for manuals and tutorial, More info can be found at BIKEgang

About ATS