Derailleur gears by 13 drive-train. Most road bicycles have two chainrings, and touring bicycles commonly have three. The rear derailleur serves double duty: moving the chain between rear sprockets and taking up chain slack caused by moving to a smaller sprocket at the rear or a smaller chainring by the front derailleur. In order to accomplish this second task, it is positioned in the path of the bottom, slack portion of chain. Sometimes the rear-derailleurs are re-purposed as chain tensioners for single-speed bicycles that cannot adjust chain tension by a different method. Although variations exist, as noted below, most rear derailleurs have
The English Pug and the French Poodle The English Pug and the French Poodle The English Pug and the French Poodle, also known as The two Snobs, is an outdoor 2013 art installation with two bronze sculptures by Marc Andre J. Fortier, installed at 500 Place D'Armes in Montreal, in Quebec, Canada. "The English Pug and the French Poodle" is a privately owned monumental sculpture made by Montreal-born Canadian artist, Marc Andre Jacques Fortier. In the heart of Old-Montreal, Quebec, the diptych evokes, with humour, the cultural discords that used to prevail between the French and English Canadians. Inspired by the historical site of the building, the