For zipping around the city, with 2 gears, the Brompton C Line Urban Folding Bike is lighter to ride and carry than all other C Line models. And with one gear trigger, it's simple to use. Those that are up and down stairs, walking along platforms and in and out of lifts will appreciate the benefits of this bike’s Iower weight.Invented by our founder, Andrew Richie, in 1975, expertly engineered to transform the bike into a small, locked package a little larger than its wheels - all in under 20-seconds. Nothing folds like a Brompton folds.Bromptons are made different. We engineer an efficient solution for moving around the city and beyond. Ours is a bike that does more than the obvious, it answers problems owners say they didn't know they had. ‘You don’t get Brompton until you get a Brompton.’Brompton C Line Urban Folding Bike Highlights.Main Frame: Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints.Rear Frame: Hand brazed cold-formed micro-alloy steel tubing.Fork:Steel brazed fork.