NuVinci Hub

If you have a motor, OK. But if you are the motor, forget it. Relative high loses (not disclaimed on the site), heavy (3.85-3.95 kg!).

so good

Sounds dodgy

Looks wonderful. But I wonder how long this kind of constant velocity system lasts without slippage.

very helpfull

there is another transmission that uses two steel rings and a steel belt.

This method of cvt relies on friction to transfer power to the wheel, without it the mechanism would slip. This means that not all of the effort imputed by the used gets through to actully drive the wheels. Excesive friction is the underlieing problem with all CVT systems, and in my opinion it is the reason none have been successful.

Due to the phase change fluid being used, internal friction losses are very comparable to any planetary-geared hub - think Nexus, for example. Or most car transmissions.

cool

hmmm awesome