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ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear. It replaces overlapping informal systems that ambiguously distinguished between sizes.
Diagram of the dw-link suspension, as implemented on an Iron Horse Sunday, showing the location of the virtual pivot point. The DW-link is a subset of the common four-bar system used widely in bicycle suspension. The four-bar system has been used on mountain bikes since the early days of suspension.
These brakes are now used on inexpensive bikes; before the introduction of dual-pivot caliper brakes they were used on all types of road bikes. Dual-pivot caliper brake. Dual-pivot side-pull caliper brakes are used on most modern racing bicycles. One arm pivots at the centre, like a side-pull; and the other pivots at the side, like a centre-pull.
Portage strap: a strap (usually made of leather) attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easier; Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is ...
Another advantage of both wheels being the same size is that the bike requires only one size of inner tube. One common arrangement is an ISO 559 (26-inch) rear wheel and an ISO 406 or ISO 451 (20-inch) front wheel.
The Swift Folder design employs a vertical folding method, using the seat-post and a split seat-tube as the locking mechanism. To fold, the seat-post is released from the two parts of the seat-tube by their respective quick release clamps, then pulled up into the upper part of the seat-tube to unlock the frame. A pivot in the main frame tube then allows the rear triangl
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A limited number of Picnica folding bikes were imported to Europe. This 1990 belt-drive model in Germany features an extended seat post. The Picnica is a folding bicycle, and part of the appeal of the belt drive is cleanliness. It is a small wheel bicycle, so belt tension may be less than on a bicycle with standard-size wheels.