Seamless simplicity. The Rover NuVinci combines TerraTrike's award-winning Rover platform with one of the most intuitive and streamlined shifting hubs on the market — the NuVinci N-330. The N-330 hub uses a continuously variable shifting system to give the rider minute control over the ride of their trike. It is a zero maintenance, zero learning curve, zero intimidation hub that makes trike riding a blast. There is no derailleur or fixed gears to worry about, and it doesn’t matter if you are pedaling or not to shift. All the rider has to do is twist the shifter on their handlebar, and the hub seamlessly increases or decreases the gearing immediately to what feels best for the rider. The gearing range goes low enough to tackle tough hills and high enough to satisfy the need for speed.