One turn of the pedals. How many turns of the back wheel, and how far would the bike go?

12.7 mm5 times bigger: one link per toothchain ring: 54 teethback gear: 27 teethchaingear changertire and rimwork standpedal
pedal turns
0.00 · 60 a minute
back wheel turns
0.00
gear
54 ÷ 27 = 2.00 wheel turns per pedal turn
chain
54 links/s × 12.7 mm = 0.69 m/s
tire speed
4.31 m/s · 15.5 km/h
per pedal turn
4.31 m
distance rolled
0.0 m

Press the steps in order, or press Auto. It runs in real time: the pedals go around once every second. Watch the yellow tape on the tire.

Gear facts from the Exploratorium, Science of Cycling: the 54-tooth chain ring and 27-tooth gear (2 to 1), the 11-tooth gear (close to 5 to 1), the 27 inch wheel, pedaling 60 to 90 times a minute, the tape mark on the tire, and which gears suit hills. Chain links 0.5 inch apart: Science Museum Group, Renold cycle chain. 1 inch = 25.4 mm: NIST. One wheel turn rolls one circumference: LibreTexts 44.4 The Wheel. Example values: 60 pedal turns a minute, 170 mm cranks, 410 mm chainstays, a 112-link chain, the gear changer, frame and stand sizes. Drawn to scale in meters with the Anatomy kit (MIT license).