Same legs, different gear.

A bicycle gear is a ratio, not a mechanism you can cheat: the chainring turns the sprocket 3.33 times for every turn of the pedals, so one pedal stroke carries you that many wheel turns down the road — and divides the force you push into the road by exactly the same number. Bicycle gearing calls that distance the development. Numbers used: a 700×25c wheel, rolling circumference 2,105 mm (so D = 670 mm); chain pitch 12.7 mm, which sets the tooth spacing drawn above; 172.5 mm cranks; a 75 kg rider on an 8 kg bike; rolling resistance coefficient 0.005; drag area C_dA = 0.35 m² in air of density 1.225 kg/m³; 97% drivetrain efficiency. The pedal force is the average tangential force over a whole revolution, worked back from the power needed to hold that speed — a real pedal stroke is lumpy, peaking at roughly twice the average near the top of the downstroke, so the worst moment is harder than the number shown. Force is the thing the gear ratio actually sets, which is why it gets the gauge; whether you could keep pushing it is a question about power instead, so that number sits beside it (a fit amateur holds something like 250 W for an hour, a sprinter well over 1,000 W for a few seconds). The gauge's reference line is the rider's own weight, 736 N, which is about all you can put through one pedal by standing on it without hauling up on the bars. Steady speed only: no wind, no drafting, and nothing here covers accelerating.