The only production CVT I've seen so far is the NuVinci N360. With a gear width of 360% and a weight of 2.45kg, I don't think I'd choose CVT just yet. Which is too bad; I really like CVT. As Sheldon Brown says...Originally Posted by Froze
a 12 speed in the future? Perhaps, but I think they'll probably go to a CVT type of system instead, or perhaps after a 12 speed is introduced? I don't know, but sooner or later CVT will become the standard.
Quote: The Perfect Bicycle If you had a perfect bicycle, with an infinite number of gears, you would always be pedaling at the same cadence, with the same amount of resistance to the pedals. Of course, the bike would go slower uphill, and faster downhill, but your legs would not know the difference.
http://sheldonbrown.com/gears.html