NuVinci Bicycle CVT

i tried it with my balls it hurt

I'm curious about it weight, durability, ease of servicing the hub, and how efficient the power transfer is (how much energy is lost in the hub)

I want one!

This is what I am finding!

Thanks for complicating an already mixed up world. That looks like an utter monstrosity. Can't wait to see them all broken down.

The shifting of the ball acts like the different size gears... dunno why you don't get the rest, it's simple to me. I just see alot of issues with leaking, and weight. but then I guess the balls could be hollow. although I see the application on heavier vehicles, it seems like alot of device to replace the simplicity of the common gear system on bikes. but I guess its a novelty some might just have to have...

how  much

It's a heavy, powerful vehicle z08. With a 6 speed, it'd get 13-14 mpg!

The circumference of each ball is biggest at the center and smaller near the ends. So, turning the balls at the same point from the center is a 1:1 ratio. As you move towards either end, then one end is spinning closer to the center (a greater distance) and one is spinning closer to the end (a smaller distance). This causes one end to spin slower (or faster) than the other end, giving various gearing ratios.

probably not. Then again, if a regular gearbox develops a leak and you don't notice it in time, you'll need to call a towtruck as well (or in case of a motorbike : push it home).