How do sprockets work? A chain or belt is used to connect two sprockets, with one being the ‘driver’ and the other being ‘driven’. Motion or force then drives them, which transmits power or changes the torque or speed of a mechanical system.
How do sprocket ratios work?
The sprocket ratio is simply
the number of teeth on the driving sprocket (T
1
) divided by the number of teeth on the driven sprocket (T
2
)
.
How do sprocket gears work?
You can gear up by using a smaller rear sprocket or a larger countershaft/front sprocket.
Gearing up adds more speed and decreases the final drive ratio
. You can gear down by using a larger rear sprocket or a smaller front sprocket. Gearing down reduces speed and increases the final drive ratio.
What does a bigger sprocket do?
Gearing down by installing a larger rear sprocket (like with our YZ example)
increases the final drive ratio and reduces top speed, but can increase acceleration
. Gearing up, like with a smaller rear sprocket, decreases the final drive ratio and adds more top speed to your motorcycle or ATV.
What does less teeth on a sprocket do?
Lower gearing delivers more rotation of the rear wheel for each spin of the countershaft, thereby
raising engine RPMs and improving throttle response for quick acceleration
. The compromise is lower top speed and fuel economy.
Is more teeth on a sprocket better?
As a quick rule of thumb,
the more teeth on the rear sprocket, the lower the gearing
. Conversely, the fewer teeth on the countershaft sprocket, the lower the gearing.
Does 1 tooth on rear sprocket make a difference?
One tooth wont make much difference
but you do need to replace that chain too. You should be able to go +3 and still use a stock length chain.
How do you count teeth on a sprocket?
How do sprockets reduce speed?
How does sprocket increase torque?
How do I get low end torque on my motorcycle?
A smaller sprocket on the front, bigger on the rear
will take-away top end speed and increase bottom-end torque. A bigger sprocket on the front, and smaller on the rear will increase top end speed and take away bottom-end torque.
What is the biggest sprocket?
The largest sprocket on a road bike cassette is generally smaller than those on mountain bikes, providing smaller jumps between gears. Most road bike cassettes have an 11, 12, or 13-tooth smallest sprocket, then
between 21 and 32 teeth
on the largest sprocket.
How do you pick a sprocket size?
Determine the number of teeth of the small sprocket.
The number of teeth for the large sprocket is determined by multiplying the number of teeth for the small sprocket by the speed ratio
. More than 15 teeth on the small sprocket is recommended. The number of teeth on the large sprocket should be less than 120.
How does sprocket size affect torque?
Changing your rear sprocket won’t give you more mid range or change the engine power curve in any way.
It will alter the torque at the rear wheel at all RPMs
. The bike should accelerate faster through the gears but you will also loose out on top speed. You don’t need to get dyno tuned just for changing a sprocket.
How many teeth does a bike sprocket have?
On a typical road bike,
the smallest sprocket will typically have 11(11t) or 12 (12t) teeth and the largest 25 (25t) to 32 (32t) teeth
.
What sprocket is best for wheelies?
If all you want to do is wheelie, then go something like
12/50
…you’ll wheelie in every gear…but you’ll only be able to do 50mph.
How do you change gears on a sprocket?
Should I change the front or rear sprocket?
Doing the rear is better from a chain and sprocket wear perspective
. A smaller front sprocket will excert more force on the chain and wear it and the sprocket faster which is why most will tell you to do the rear. If changing front, I would recommend against more than -1.
What does adding a tooth to the front sprocket do?
As you add to the low end,
you lose upper end
. The same goes if you need to gain on the upper, you will lose lower. Front sprockets are more of a dramatic change. 1 tooth smaller on the front = about 4 teeth more on the rear.
What does changing the front sprocket on a motorcycle do?
The purpose of changing sprocket sizes is to
alter the relationship between engine speed on your tachometer and road speed on your speedometer
.
Does changing sprockets affect mileage?
Most of the newer bikes run the speedo off the rear wheel, taking the reading at the front sprocket or final output shaft so,
yes it will effect the speedo reading and odometer reading by whatever percentage change you make to the final drive
.
How do you increase acceleration on a bike?
- Ride your bike around for 10-15 minutes so the system warms up nicely.
- Search for the fuel/air screws that are responsible for adjusting the fuel-air ratio.
- There is another screw which sets the idle speed of your bike (it sets the engine rpm at ‘idle’ run)
Is a bigger chainring faster?
Will you go faster if you replace the stock chainring on your bike, like the 50t one shown here, with a larger chainring, like the 56t behind it?
99% of the time the answer is no, you will likely go slower
. That example is for a 50 tooth front, 12 tooth rear sprocket.
