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You can find a 24-inch bike with training wheels suitable for adults at most bike shops or online retailers that specialize in adult-sized bikes.
Because if you have the pedals stuck to the wheel axle, and no gearing inbetween, the only way to get some useful speed out of the bike is to have a really large wheel.Because before the chain drive and gearing was invented, bikes were direct drive - meaning that the drive wheel spun at the same rate as the pedals. The only way to get some speed out of the bike then was to make the drive wheel really big.Once the chain drive made it easy to add a gearing ratio wheels could be built with equally sized wheels and a better rider position.
I think you've gotten your phrases confused.A high-wheeler was a direct drive bike with the pedals stuck directly onto the axle of a huge front wheel. They tended to flip over during hard braking.Safety bicycle was the name given to the the chain-driven bikes with equally sized wheels that weren't as prone to flipping over.
A bike with 4 wheels has 4 wheels.
The safety bike was different in that both wheels were the same size.
There are different sizes for dirt bike wheels as there are for regular bike wheels.
Because the wheels move at another pace than the cranks, which is caused by the chain and the differently sized sprockets acting as levers.
Thin wheels alone isn't enough to identify the bike type. Can be a road bike, bike, a track bike, a TT bike. Even fixies and single-speeds can have thin wheels.
A bike trailer typically has two wheels.
The wheels are the big round things on which the bike moves and the axles are at the center of the wheels, attaching them to the bike.
Usually not. The penny Farthing was invented before the inflatable bicycle tire was developed.
Tubular bike wheels offer advantages such as lower rolling resistance, better handling, and reduced risk of pinch flats compared to other types of bike wheels.