English engineer Greg Mitchell spent nearly 750 hours transforming a 20-year-old Yamaha R6 and spare steel into the world`s fastest penny-farthing a bicycle from the late Victorian period whose odd name was inspired by the size difference between its front and rear wheels.

Mitchell created the SuperFarthing, using a massive 165-kg front wheel with 420 machined pieces and a vertical swing arm. Initially, the bike was nearly impossible to ride, and steering issues forced Mitchell to redesign it with a rigid fork, a reinforced frame, and hydraulic power steering controlled by handlebar buttons.

Though not road-legal in England due to its non-pneumatic front wheel, Mitchell has reached 50 mph on short runs and believes it could hit 140 mph under ideal conditions. The SuperFarthing remains a bold and visually stunning engineering feat.