Tern has updated its Vektron folding e-bike with a new range of models featuring a more powerful motor and the option to run a belt drive over a chain. Here at ebiketips, we're big fans of the Vektron for its versatility and the way it offers the ride of a full-sized e-bike without needing the same amount of storage space. The Vektron doesn't compromise in the same way a lot of other folding e-bikes often do. Yes, it's heavier than many, but motor performance was excellent even before this up...