Most of the weight of the dragster (or rail job, or whatever) has been located at the rear so that the rear wheels get the most traction that they can. Since there is relatively little weight on the front wheels, they can be lighter duty than, say, a stock motor vehicle. A narrow wheel and hub will serve for the light load, and a narrow tire inflated to a high pressure has a low rolling friction compared to an ordinary auto tire. The hub bearings can be light duty and low friction as well, all adding up to lower rolling resistance and lower elapsed times for the dragster.
they are stopped by a parachute that comes out the back
Having the engine and thus most of the weight level with the drive wheels and such along front.
You need to use the wheels from the kit. They are all the same size.
Some farm tractors that have small wheels in the front and larger wheels in the back is to help farmers pull larger equipment. The large tires have more traction and the smaller wheels help to steer.
Rear engine dragsters are more aerodynamic and provide better traction.
A laundry cart on wheels could definitely be useful while you organize your garage. They can hold a large amount of items and being on wheels means you can easily move them around without straining your back.
people
aerodynamics
Some use gasoline, some use alcohol, and the top fuel dragsters burn nitro methane.
Top fuel dragsters can reach speeds of over 330 mph (531 km/h) in just a quarter-mile race. These dragsters can go from 0 to 100 mph (160 km/h) in less than a second.
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Parachute-aided braking