Tanks have interior wheels that drive their treads, which revolve around the outside of the entire set of hub wheels. Light tanks may have road wheels that are fitted underneath, to avoid damaging the surfaces of roadways and bridges.
Spread the weight over a larger area. For a human: snow shoes, skis For a vehicle: bigger wheels, treads
It takes a lot more force to keep treads rolling along than it takes to keep wheels rolling along. And they cause more wear on roads. So they're only used where they're absolutely needed.
treads :) haha apex
Not indoor. This may sound weird but you want as much contact with the ground in as small area as possible. outdoor has a tendency to create tread on your wheels just from skating across asphalt which chews up your wheels. Remember tread helps your grip when torque is applied by the tread itself. in speed skating your wheels are not powering you therefore it is not helpful or necessary.
yea, treads Actually they are called "Reeds".
Actually there are lots of vehicles which do not have round wheels. A sled has runners (runners are essentially large skis). A military tank runs on caterpillar treads. Various forms of air travel do not require wheels (although some do use landing wheels). Boats do not require wheels (although they may have steering wheels). And so forth. If you are asking why wheels are round instead of some other shape, round wheels roll more easily than any other shape.
Tank treads can rip up pavement, especially when moving at high speed. The military does not care about this, especially when fighting a war and they usually drive where there are no paved roads. However car drivers, cities,, etc. really would prefer to leave the pavement intact, as repairing or replacing it is expensive.
Rubber Stair treads are used for when there is a tear in some clothing that has elastic bands. You can replace the elastic bands with rubber stair treads. It will make the band sturdier.
It is 0.95
They are the side members that the treads are fastened to, sometimes notched out to receive the treads.
New treads for bicycles can be purchased from most high street bicycle shops. New treads can also be purchased online at sites such as BikeRadar and BicycleTires.