Editing Tricycle (section)

===Recumbent===
[[File:Recumbent Tricycle.jpg|thumb|Recumbent tricycle]]
[[File:Recumbent tricycles on the road to Ladakh.jpg|thumb|Recumbent handcrank driven tricycles on the road to [[Ladakh]]]]

Recumbent trikes' advantages (over conventional trikes) include stability (through low [[centre of gravity]]) and low [[aerodynamic drag]]. Disadvantages (compared to bicycles) include greater cost, weight, and width. The very low seat may make entry difficult, and on the road they may be less visible to other traffic.<ref>{{Cite web|url=http://www.jetrike.com/why-ride-a-trike.html|website=Jetrike.com|title=Why Ride a Trike?|access-date=2016-07-11}}</ref>{{Citation needed|date=October 2015}}

====Delta====
[[File:Kettwiesel-rot.jpg|thumb|Delta layout [[Hase Spezialräder]] Kettwiesel]]
A recumbent delta is similar to an upright, with two wheels at the back and one at the front, but has a recumbent layout in which the rider is seated in a chair-like seat. One or both rear wheels can be driven, while the front is used for steering (the usual layout). Steering is either through a linkage, with the handlebars under the seat (under seat steering) or directly to the front wheel with a large handlebar (over seat steering). Some delta trikes can be stored upright by lifting the front wheel and resting the top of the seat on the ground.

Delta trikes generally have higher seats and a tighter turning radius than tadpole trikes. The tight turning radius is useful if riding on trails with offset barriers, or navigating around closely placed obstacles. The higher seat makes mounting and dismounting easier. Even with the higher seat a delta trike can be quite stable provided most of the weight (including the rider) is shifted back towards the rear wheels. Many delta trikes place the seat too far forward and that takes weight off the two rear wheels and puts more weight onto the front wheel making the trike more unstable.<ref>{{cite web |title=The Golden Rule of Trike Design |date=10 April 2010 |url=http://def-proc.co.uk/b/zydsg |url-status=live |archive-url=https://web.archive.org/web/20231026134512/https://www.defproc.co.uk/analysis/the-golden-rule-of-trike-design/ |archive-date=2023-10-26 |access-date=2014-07-02}}</ref><ref>{{Cite web |url=http://www.murraystrikelinks.com/ |title=Murray's Trike Links |access-date=2016-12-23 |archive-date=2020-02-02 |archive-url=https://web.archive.org/web/20200202201730/http://murraystrikelinks.com/ |url-status=dead }}</ref> The Hase Kettwiesel delta trike has an {{Convert|18|in|abbr=on}} high seat that is placed to put most of the weight onto the cambered rear wheels making it more stable.

[[File:Tri-Fecta folded trike jeh.jpg|thumb|upright=0.9|Small folded delta trike parked in New York]]
Delta trikes are suitable to be used as manual scooters for mobility, rehabilitation and/or exercise. The Hase Lepus Comfort is an example of a rehabilitation delta trike designed mainly for comfort and ease of use. It has a lowered front boom and the seat can be adjusted to a height of {{Convert|20|to|28|in|abbr=on}}, which aids in mounting and dismounting. It also has rear wheel suspension for comfort. The {{Convert|56|lb|abbr=on}} Lepus can be folded for easier storage and transportation.

The weight of a delta trike can be quite close to the weight of a tadpole trike if they are both of a similar quality and similar materials are used. The Hase Kettwiesel Allround delta trike has an aluminium frame and weighs 39.4&nbsp;lbs (17.9&nbsp;kg).<ref>{{cite web|url=http://hasebikes.com|title=Startseite – Liegeräder, Tandems, E-Bikes, Handbikes}}</ref> The Catrike Road tadpole trike has an aluminium frame and weighs 37.5&nbsp;lbs (17&nbsp;kg).<ref>{{cite web|url=http://www.catrike.com|title=Catrike Recumbent Trikes}}</ref>

====Tadpole====
{{Unreferenced section|date=May 2012}}
[[File:Q-Cycles Njunis in Tadpole Bauform.jpg|thumb|Recumbent tadpole]]

The recumbent tadpole or reverse trike is a recumbent design with two steered wheels at the front and one driven wheel at the back, though one model has the front wheels driven while the rear wheel steers. Steering is either through a single handlebar linked with tie rods to the front wheels' stub axle assemblies (indirect) or with two handlebars (rather, two half-handlebars) each bolted to a steerer tube, usually through a bicycle-type headset and connected to a stub axle assembly (direct). A single tie rod connects the left and right axle assemblies.

The tadpole trike is often used by middle-aged or retiree-age former bicyclists who are tired of the associated pains from normal upright bikes. With its extremely low center of gravity, aerodynamic layout and light weight (for trikes), tadpoles are considered the highest performance trikes.

Most [[velomobile]]s are built in a tadpole trike configuration since a wide front and narrow rear offer superior aerodynamics to a delta trike configuration.

====Hand-crank====
[[File:Bew 75km.JPG|thumb|Racing handcycle]]
{{See also|Handcycle|Para-cycling}}

Hand-crank trikes use a hand-operated crank, either as a sole source of power or a double drive with footpower from pedals and hand-power from the hand crank. The hand-power only trikes can be used by individuals who do not have the use of their legs due to a disability or an injury. They are made by companies including Greenspeed, Invacare, Quickie and Druzin.{{Citation needed|date=July 2012}}

In case of paralysis of the legs, more speed and range of distance can be obtained by adding functional electrical stimulation to the legs. The large leg muscles are activated by electrical impulses synchronized with the hand cranking movement.<ref>{{Cite web|url=https://edgeryders.eu/en/cycling-for-people-with-paralysis-how-do-we-researchers-and-citizens|title=Cycling for people with paralysis: how do we researchers and citizens contribute to more testing and usability of technologies like FES?|date=2016-09-20|access-date=2016-09-23|archive-date=2017-06-27|archive-url=https://web.archive.org/web/20170627023700/http://edgeryders.eu/en/cycling-for-people-with-paralysis-how-do-we-researchers-and-citizens|url-status=dead}}</ref><!-- Im looking for a better reference -->

====Tandem====
Recumbent tandem trikes allow two people to ride in a recumbent position with an extra-strong backbone frame to hold the extra weight. Some allow the "captain" (the rider who steers) and "stoker" (the rider who only pedals) to pedal at different speeds. They are often made with couplers so the frames can be broken down into pieces for easier transport. Manufacturers of recumbent trikes include Greenspeed, WhizWheelz and Inspired Cycle Engineering.{{Citation needed|date=July 2012}}