Wednesday

October 1, 2014

October 1, 2014

Posted by **syd** on Tuesday, January 20, 2009 at 10:52pm.

- precalc -
**drwls**, Wednesday, January 21, 2009 at 7:09amThe fastest speed of the bike at a fixed pedal speed is achieved at the highest front/back sprocket or "gear" ratio of 40/12. Multiply that by 120 rev/min and pi*Diameter to get the top speed

(130 rev/min)*(40/12)*pi*(26/12 feet) = 2949.6 ft/min = 49.2 ft/s = 33.5 miles/h

Speeds with other gear combinations can be calculated similarly. The lowest speed is

(130 rev/min)*(24/28)*pi*(26/12 ft) = 758.5 ft/min = 8.6 mph at the same pedal speed. The actual speed will be slower still if the rider reduces the pedal rpm, as most riders do in the lowest gear

**Answer this Question**

**Related Questions**

precalc - a 21-speed bike has varying top speeds dependent on the gear it's in. ...

math - Your bike tire has a radius of 14 inches. If you travel a distance of 56 ...

Math - Jerrod's bike has a tire diameter of 26 inches. How far will the bike ...

physics - A bicycle has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long...

math - your bike tire has a radius of 14 inches. If your tire makes 100 ...

Math - The height from the ground to the top of a tire on a chold's bike is 42 ...

trig - bike tires are 22 inches in diameter and has an angular speed of 5 miles ...

Math - How far does the bike go on one rotation of the pedal sprocket in gear 2c...

physics - there are 3 parts to my question. i need help on the last part. 1.a. A...

Math - The bike slots in the bike rack are filled. Don's bike is in the middle. ...