You should change the wheels when they become worn out, you will notice that the silicone coating on top of the wheel is much thiner then it used to be.
when it is no longer comfortable to ride, it's time to change the wheels.
[depends on how often you ride, it may take a month or even a whole year before it's time to change your wheels..]
How often should you change the fuel filter?
as often as needed
You should change your oil every 3,000 miles. If you drive your car rough, then you should change it more often.
ive found that its best to remove the wheels and inspect the pads before ya make your descision also its dependant on your driving style and frequency
everyday
After the first 50 miles then every 500 check them.
How often should you change water pump in a boat
Every week
You should change them after every feeding because they should be washed after every feeding.
The average motorist should change the oil every 3000 miles. Oil should be changed more often if driven in dusty condition.
you should change it every week so it will always be clean.
every 3000 miles u should change them