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Recumbent bicycle

technology Maturity 11-13 Next article →

A recumbent bicycle is a unique type of human-powered vehicle (HPV) designed for comfort and speed. Unlike a traditional upright bicycle, a recumbent places the rider in a laid-back, reclining position.

v2fairing2
v2fairing2

This design changes how the rider interacts with the machine. On a standard bicycle, a rider's weight rests on their hands, feet, and sitting bones. In contrast, a recumbent distributes weight more evenly over the back and buttocks. This ergonomic advantage can make long rides more comfortable. Additionally, the reclined position creates a smaller frontal profile. This reduction in surface area helps the rider move through the air with less aerodynamic drag.

Recumbent designs are categorized by their wheelbase, which is the distance between the wheels.

LWB Lowrider Recumbent
LWB Lowrider Recumbent

Long-wheelbase (LWB) models place the pedals between the front and rear wheels. Short-wheelbase (SWB) models have a wheelbase of less than 42 inches. Medium-wheelbase (MWB) models have a wheelbase larger than 42 inches. There are also compact long-wheelbase (CLWB) models where pedals sit very close to or above the front wheel. Because there is no single standard, these designs vary widely. Some riders even use convertible models that can change between LWB and CLWB configurations.

Wheel size and drive systems also vary significantly across different models.

CruzbikeSilvio 2009
CruzbikeSilvio 2009

Many recumbents use a smaller front wheel to keep pedals clear of the wheel. This helps avoid "heel strike," where a rider's heels hit the wheel during slow, tight turns. Some bikes use front-wheel drive (FWD) instead of the traditional rear-wheel drive. A specialized version is the pivoting-boom front-wheel drive (PBFWD). In a PBFWD system, the crankset and the front fork move together. While this allows for a shorter chain, it can cause "wheelspin" on steep, loose surfaces. It may also require a learning curve to manage the pedal-steer effect.

Steering mechanisms are another major way these vehicles differ from upright bikes.

Under seat steering
Under seat steering

Over-seat steering (OSS) is direct, meaning the bars act on the front fork like standard handlebars. Under-seat steering (USS) is indirect and uses rods or cables to link the bars to the headset. This is common on many tadpole trikes. Some designs even use center steering or pivot steering, which may not use handlebars at all. Even the number of wheels can change the vehicle type. A three-wheeled recumbent is a tricycle, while a four-wheeled version is a quadracycle.

Faireds1
Faireds1

Racing enthusiasts often use specific types of recumbents to maximize performance.

Challenge Hurricane recumbent
Challenge Hurricane recumbent

Lowracers are popular in Europe and feature a seat positioned between the wheels. This extremely reclined position is highly aerodynamic. Highracers use two large wheels and a higher seat to keep the rider's legs above the front wheel. Highracers are generally easier to balance at low speeds because they have a higher center of mass. Some riders also add fairings, which are aerodynamic shells. These fairings reduce drag and keep the rider warm. When a bike is fully enclosed by a fairing, it is called a velomobile.

History shows that the pursuit of speed has led to both innovation and regulation.

Speed recumbents were so efficient that the Union Cycliste Internationale (UCI) banned them in 1934. Despite this, the community continued to push boundaries. Today, organizations like the World Human Powered Vehicle Association (WHPVA) and the International Human Powered Vehicle Association (IHPVA) oversee recumbent records. The World Recumbent Racing Association (WRRA) also manages racing events. These groups ensure that the science of human-powered speed continues to evolve.

Recumbents are also designed for accessibility and social riding.

Handcycle
Handcycle

Handcycles are specialized recumbent trikes designed for people with little or no use of their legs. These use hand cranks to provide power. For those who want to ride with others, tandem recumbents are available. Some tandems are "sociable" models where riders sit side by side. Others are hybrid designs, such as the Hase Pino Allround, which places a recumbent stoker in the front and an upright pilot in the rear.

Barcroft Columbia
Barcroft Columbia

Whether for racing, touring, or accessibility, the recumbent offers many ways to travel.

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🖼️ Images & Media (23)
File:v2fairing2.jpg
v2fairing2.jpg
File:Nijmegen, Magasin de vélos couchés.JPG
Nijmegen, Magasin de vélos couchés.JPG
File:CNC Cruzbike 2007.jpg
CNC Cruzbike 2007.jpg
File:LWB Lowrider Recumbent.jpg
LWB Lowrider Recumbent.jpg
File:Under seat steering.JPG
Under seat steering.JPG
File:0x-flevo-1.jpg
0x-flevo-1.jpg
File:Lightning_Phantom.jpg
Lightning_Phantom.jpg
File:CruzbikeSilvio 2009.jpg
CruzbikeSilvio 2009.jpg
File:Nzleitras.jpg
Nzleitras.jpg
File:Challenge Hurricane recumbent.jpg
Challenge Hurricane recumbent.jpg
File:Barcroft Columbia.jpg
Barcroft Columbia.jpg
File:Faireds1.jpg
Faireds1.jpg

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