The new Brompton Electric G Line is what happens when Britain’s most iconic folding bike plugs in, bulks up, and keeps pace with modern life and essential escapes. The Electric G Line reminded me that on a really good bike, you just stop thinking. The “G” in G Line might stand for gravel, but I’d file that under sometimes use. So, who should buy the Brompton Electric G Line? Starting around $4,950, the Electric G Line isn’t cheap, but it’s not meant to be.