I'm trying to calculate the torque i would need to pedal when in the highest gear on my bike to sustain a constant speed on level ground. Basically i just want someone to review my calculations and make sure they're correct. I leg press 270 pounds and therefore each of my legs can supply 135 pounds of force. So when i turn the cranks with 135 pound-feet of torque with a gear ratio of 1:4.33 (I have a 52 tooth on the front and 12 on the back) , then the hub of the wheel on my bike in the rear wheel will be turning with 31.1 pound-feet of torque. When pedaling at 80 rpm, I would be going 27.5 mph. Now using the following information i calculate the air resistance: Fd= 1/2pv^2ACd. p= 1.3 kg/m^3 v= 13.44 meters/sec. A= 1.15 meters^2 Cd= 0.9 I get 121.52 Newtons or 27.28 pounds of force for the air resistance. So then taking into account rolling resistance of 2.352 Newtons or 1.71 pounds, this brings me to a total required torque of 28.99 pound-feet. My process for determining this required torque is correct, right? And if it is correct, then how would i determine the amount of power required to sustain this speed?