The smaller gear turns four times in the time it takes the larger gear to turn once. This means the smaller wheel is four times easier to turn: turning the small wheel around once requires only a quarter of the force used to turn the large wheel around once.
The smaller wheel (the wheel with fewer teeth) will always turn faster than the larger wheel (the wheel with more teeth). The small wheel turns in the same direction as the large wheel, and in the opposite direction as the medium wheel. The small wheel turns fastest; the large wheel turns slowest.
If the driven gear has more teeth than the driving gear, the driven gear rotates at a slower rotational speed. If the driven gear has less teeth than the driving gear, the driven gear rotates at a faster rotational speed.
A lower (taller) gear ratio provides a higher top speed, and a higher (shorter) gear ratio provides faster acceleration. . Besides the gears in the transmission, there is also a gear in the rear differential.
The large gear has a lower RPM rate than the small gear. IF the small gear was the DRIVING or INPUT gear then the large DRIVEN or OUTPUT gear would be turning more slowly.
It's all about power. Lower gears require more revolutions (and therefore less energy per revolution) to achieve the same distance. So the power requirement is less.
High Gear = Hard = Good for Descending: The “highest” gear on your bike is the largest chain ring in the front and the smallest cog on your cassette (rear gears). In this position, the pedaling will be the hardest and you'll be able to accelerate while traveling downhill.
Gear ratios can be boiled down to a single statement: Higher ratios (with a lower numerical value) give better torque/acceleration and lower ratios allow for higher top speeds and better fuel economy. Higher ratios mean the engine has to run faster to achieve a given speed.
The higher-gears are tall, which allow for better fuel consumption at cruising speeds. As the number of gears increase, the ratio becomes more aggressive, which improves the 0-to-60 mph time (0.2 seconds faster in the 2017 F-150) and raises the top speed.
2) Torque - In most cases, more torque can be transmitted through a physical gear with fewer teeth (stronger, more robust).
In short, lower gear gives higher torque at the wheel and higher acceleration and lower car speed. Higher gear gives lower torque at the wheel and lower acceleration and higher car speed.
First gear provides the most pulling power but the least potential for speed, whilst fifth gear which provides the least pulling power allows the greatest range of speed. The following table indicates typical speed and revs for changing gears up or down.
Remember each car will be geared slightly differently, but a good rule of thumb for changing gears is that first gear is for speeds up to 10 mph, second gear is for speeds up to 15 mph, third gear is for speeds up to 35 mph, fourth gear is for speeds up to 55 mph, fifth gear is for speeds up to 65 mph, and sixth gear ...
Increase speed: If you connect two gears together and the first one has more teeth than the second one (generally that means it's a bigger-sized wheel), the second one has to turn round much faster to keep up. So this arrangement means the second wheel turns faster than the first one but with less force.
Tall gearing helps to ride at low engine speeds comfortably, thus returning a decent amount of fuel efficiency in the long run. Short gearing tends to reduce mileage as the engine attains high speeds frequently, thus consuming more fuel.
Having more gears allows smaller, more economical engines to power larger vehicles or improves the efficiency of existing engines.
Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91's, 4.11's etc. Always remember, for very “give” there is a “take”. If you take lower gears to accelerate quickly from 0-60, you will give top-end speed.
A Gear Ratio can increase the output torque or output speed of a mechanism, but not both. A classical example is the gears on a bicycle. One can use a low gear that allows one to pedal easily up hill, but with a lower bicycle speed.
The gears allow one to trade torque for angular velocity (i.e., if the gears are of unequal size, the larger gear will experience higher torque but lower angular velocity than the smaller gear).
New Word Suggestion. The lowest gear on a bicycle. The smallest chainring on a crank with three chainrings. So easy to pedal that granny could do it.
Downhill: Use first gear when driving downhill as a primary source for braking. Engine braking means you don't need to use the brake pedal as much, which keeps your wheels turning. If the wheels are turning you can steer, important when undertaking a steep downhill run.
Why is gear 1 the strongest? On 1st gear power produced by engine rotates wheel on very less speed, thus pulling force on chain is very high. On higher gear same engine power will drive wheel on higher rpm thus force will decrease.