by Banga Koupit

A trike is a motorized three wheeled vehicle, often with an appearance closer to a motorcycle than to a car. These machines have increased in popularity in recent years, being seen as an excellent alternative to motorbikes. There are strict definitions of what most owners think of a trike as being. A motorcycle with a sidecar is not, for instance, seen as being one, despite the fact that it has three wheels.

Indeed, there are regular get togethers in the UK where bikers and trike owners meet. As with other forms of transport, there are environmental concerns surrounding the three wheelers. Some manufacturers are looking to ease such worries by attempting to produce more environmentally friendly models.

Whether such models gain popularity will be interesting. One thing is for certain - trike owners will continue to enjoy the experience of riding these unique vehicles.

While most children's trike have direct drive, a small number of models such as the Cheetah have chain drive. Unlike adult bikes, children's trikes do not always have inflatable wheels; instead, some trikes have solid rubber wheels. While this adds to the weight of the tricycle and reduces the shock-absorbing qualities, it eliminates issues with flat tires, punctures, and leaky tubes. Since most trikes are direct drive, the child can slow the trike down by resisting the forward motion of the pedals, as with an adult fixed gear bike. Pull brakes are rarely used on kid's trikes, but some "Bigwheel"-style plastic trikes have lever brakes in which an inverted half-moon-shaped brake pad is pressed against the driving surface of the righ rear wheel.

Typical upright trikes for adults have front and rear brakes. The front brakes are usually "pull brakes" or V-brakes, and the rear brakes can be pull brakes or internal drum brakes (which operate like automobile drum brakes).

Recumbent trikes often brake one wheel with each hand, allowing the rider to brake one side alone to pull the trike in that direction. This has led to a geometry (also called centre point steering) with the kingpin axis intersecting the ground directly ahead of the tyre contact point, producing a normal amount of trail. This arrangement, elsewhere called "zero scrub radius" is used to mitigate the effects of one-sided braking on steering. While zero scrub can reduce steering feel and increase wandering it can also protect novices from spinning out and/or flipping.

Urban delivery trikes are designed and constructed for transporting large loads. These trikes include a cargo area consisting of a steel tube carrier, an open or enclosed box, a flat platform, or a large, heavy-duty wire basket. These are usually mounted over one or both wheels, low behind the front wheel, or between parallel wheels at either the front or rear of the vehicle, to keep the center of gravity low. The frame and drivetrain must be constructed to handle loads several times that of an ordinary bicycle; as such, extra low gears may may added. Other specific design considerations include operator visibility and load suspension. Many, but not all, cycles used for the purpose of vending goods such as ice cream cart trikes or hot dog vending trikes are cargo bicycles.

Freight trikes are most often of the tadpole configuration, with the cargo box (platform, etc.) mounted between the front wheels. India and China are significant strongholds of the rear-loading "delta" carrier trike. Freight trikes are also designed for indoor use in large warehouses or industrial plants. The advantage of using freight trikes rather than a motor vehicle is that there is no exhaust, which means that the trike can be used inside warehouses. While another option is electric golf cart-style vehicles, freight trikes are human-powered, so they do not have the maintenance required to keep batteries on golf carts charged up. For more information, see the articles on "workbike" and "freight bicycle".

The largest manufacturer of recumbent trikes is Sun Bicycles who make both tadpole and delta trikes. The deltas are built from designs licensed from Gardner Martin's EasyRacers, the premiere maker of recumbent bicycles. Sun bicycles are factory-made in Taiwan and are among the least expensive trikes of good quality.

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