Review: Specialized Turbo Vado 6.0

Like many cyclists who consider themselves purists, I’ve had difficulty wrapping my brain around the increasing popularity of e-bikes: Worldwide sales tallied 36 million units in 2016. German postal workers use e-bikes on their routes, and in the US, major bike manufacturers like Specialized, Cannondale, and Trek have introduced a surprising array of motorized options, from off-road fatties to commuters.