Like in an automatic transmission LOL!!!
The weight problem will always be an issue with NuVinci. I just now remembered that the NuVinci was my secondary reason for creating the Crash Couse... so that more people would easily choose that option, thereby driving down the price, and I'd be able to see if it's really as durable as they claim. It's definitely durable.What I dont like is the weight which I am getting used to now and the cost.
I've got one it seems like the best possible manual transmission for a bicycle IMO. Now it seems most motored bikers ride mostly on the flats which makes this thing rather useless but I was sick of having to make the compromise between high torque gearing for fast hill climbing and trail riding at the expense of top speed for on the road. I've read that you can keep pretty good cadence while pedaling with the engine too. So gone are the days that the engine is spinning the wheels too fast for me to pedal in tandem. I haven't finished my bike but I'm expecting it to be the bomb!