Gear ratio coverage is always a critical issue when deciding the configuration of your bike. The ideal gear ratio depends on the rider's strength, the terrains of the rides, and the bike's structure. When it comes to folding bike, the limitation is even tougher to break. Most folding bikes are designed for single chainring with IGH to achive multiple gear ratios. This limitation sacrifices the ridability and often increases overall bike weight because of the IGH.
This is where the ATS Speed-Drive comes into play. What is speed drive? Think of it as the gearbox on your car. with an easy gear shift action (can be heel kick in our case), you get to change the gear ratio up to 250%. Crazy? Not really.
Speed Drive will make the chainring spins at a higher rate. This means, for instance, a 27 tooth chainring with speed-drive engaged will work like a 2.5 times larger one (68 tooth chainring). That's why speed-drive is often used for fast bikes like recumbents, or folding bikes, where it compensates for the small rear wheel.
ATS Speed Drive is a proven technology that has been installed on many types of bikes, such Strida (belt drive) or even on CarryMe ...
Please do not hesitate to contact us if you need any advise for your best gearing system!
FAQ can be found Here.
And our 2015 catelog.
ATS, Fujiss Corp. is committed to giving consumer the ultimate quality and advance in transmission system parts. We focus on consumer's needs and satisfaction as the core of our company creed.
The ATS-Speed drive is manufacturing under license of Haberstock Mobility GmbH. We make this excellent bike gearing system in efficient production and inexpensive. We would like to let consumer have another choice to make their own bike more simple, clean (no shifting cable), easy riding or even enhance function of bike.
The ATS-Shaft drive technology is come from car industry. We make the shaft drive more light weight to fit for bike riding. And make it in perfect transmission efficiency. It will let bike designer have chance to make bike more clean, less pollution, simple, refined and elegant. We have a lot of gear ratio you can choose and compatible with many well-know internal hub system. It make bike in reasonable gear ratio and riding comfortable.
Some photos of the installation on folders.