Editing Recumbent bicycle (section)

===Drive===
Most recumbents have the cranks attached to a boom fixed to the frame, with a long drive chain for rear wheel drive. However, due to the proximity of the crank to the front wheel, front wheel drive (FWD) can be an option, and it allows for a much shorter chain. One style requires the chain to twist slightly to allow for steering.<ref name="Toxy">{{cite web
| url = https://recumbentbikelab.com/
| title = Recumbent Exercise Bike Resources
| access-date = 24 July 2018}}</ref>

[[File:CruzbikeSilvio 2009.jpg|thumb|260px|Cruzbike Silvio (2009) A moving (pivoting) bottom bracket, front wheel-drive, 700C road bike (with rear rack).]]
Another style, pivoting-boom FWD (PBFWD), has the crankset connected to and moving with the front fork.<ref name="traylor">{{cite web
| url = http://traylorfwd.home.mindspring.com/fwd.html
 | title = Front Wheel Drive – Is it practical?
| access-date = 22 October 2006 |archive-url = https://web.archive.org/web/20061022094132/http://traylorfwd.home.mindspring.com/fwd.html |archive-date = 22 October 2006}}</ref> In addition to the much shorter chain, the advantages to PBFWD are use of a larger front wheel for lower rolling resistance without heel strike (you can pedal while turning) and use of the upper body when sprinting or climbing. The main disadvantage to all FWD designs is "wheelspin" when climbing steep hills covered with loose gravel, wet grass, etc. This mainly affects off-road riders, and can be ameliorated by shifting the weight forward, applying steady pressure to the pedals, and using [[Bicycle tire|tires]] with more aggressive tread. Another disadvantage of PBFWD for some riders is a slightly longer "learning curve" due to adaptation to the pedal-steer effect (forces applied to the pedal can actually steer the bike). Beginner riders tend to swerve along a serpentine path until they adapt a balanced pedal motion. After adaptation, a PBFWD recumbent can be ridden in as straight a line as any other bike, and can even be steered accurately with the feet only. [[Cruzbike]] is the only PBFWD recumbent currently in production, and features a traditional steering axis similar to most standard and recumbent bikes. Flevobike formerly produced a center-steered FWD bike similar to the [[Python Lowracer]].

Yet another drive-train variation is on [[rowing cycles]] where the rider rows using arms and legs.