International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 02 Issue: 03 | June-2015 www.irjet.net p-ISSN: 2395-0072 © 2015, IRJET.NET- All Rights Reserved Page 1794 A Review on Design Developments in Bicycle Gicky Jose Malppan 1 , Tom Sunny 2 1 PG Scholar, Department of Mechanical Engineering, Amal Jyothi college of Engineering Kanjirapally, India 2 Assistant Professor, Department of Mechanical Engineering, Amal Jyothi college of Engineering Kanjirapally, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract—Bicycle is a two wheel vehicle, which is being powered by a rider and can be steered using a handle. It is one of the most eco-friendlier and an economical mode of transport word wide. There were various forms of bicycle in the past history through which the existing form has evolved. Studies are still going on for making bicycling more comfortable and economical. In this review paper, the details of various designs in the history of bicycle are described. Various data’s regarding different parts of a common safety bicycle are also described. Details of Free Wheel Mechanism which provide one directional motion to the drive wheel are exhibited. This review paper summarizes an up-to-date progress in different methods for transmission of human power on the pedal to the rotation of the wheels and the major advantages and disadvantages of these transmission methods reported in the literature. It covers how the energy efficiency of the bicycle is calculated considering the case of a chain driven safety bicycle. It is intended to help readers to obtain a comprehensive review on design developments in bicycle. Keywords - free wheel mechanism; safety bicycle 1. INTRODUCTION 1.1 History of Bicycle There were several unverified, claims for the invention of machines like bicycle. In 1493, the earliest comes from a sketch which being attributed to Gian Giacomo Caprotti. Primitive version of a bicycle sketch was surfaced in 1974 by Leonardo da Vinci. [1] Fig -1: Caprotti sketch A. Celerifere The Celerifere was built by Comte de Sicrac, in 1791. The Celerifere, purportedly was a hobby horse with two wheels instead of a rocker. A rider would power forward by running or walking with their feet and then glide on the celerifere. In 1817, German Baron, Karl Drais Von Sauerbronn invented a laufmaschine, means a running machine, an improved two- wheel version of the celerifere,. It was variously called the running machine, velocipede, Draisienne and Dandy horse. It had a steer-able front wheel directing the front wheel a bit. [3] Fig – 2: Wooden Draisine Drais' 1817 Fig -3: A velocipede, 1819 In 1839, Kirkpatrick MacMillan built the first mechanically propelled 2-wheel vehicle. In Velocipedes, the system of driving levers and pedals that allows rider to propel the machine with feet off the ground was introduced by him. B. Velocipede [5] Velocipede, the bike literally a bone shaker, was manufactured with straight angles, steel wheels and stiff materials which made this bike to ride over the past cobblestone roads. The Velocipede was provided with direct drive with peddles by front wheel and a fixed gear, with one speed. This bike was also known as the bone shaker. French