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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 ...
One-piece cranks are easily maintained and reliable, but heavy. They are found on BMX bikes as well as children's bicycles and low-end road and mountain bikes. They fit only frames with American sized (also known as "Pro size") bottom brackets. The bearings are normally open to the elements and easily contaminated, although this rarely causes ...
The product line currently includes almost all parts necessary to build a BMX bike except frames. In 2005 the company won a design distinction award from ID magazine for the Elementary stem [ 3 ] which gained a US patent [ 4 ] and challenged the prevalent stem design of the time which used 6 bolts and replaced them with a single bolt ...
Parts of a threadless headset before installation. The headset is the set of components on a bicycle that provides a rotatable interface between the bicycle fork and the head tube of a bicycle frame. The tube through which the steerer of the fork passes is called the head tube. A typical headset consists of two cups that are pressed into the ...
GT was founded in 1972, by Gary Turner and Richard Long in Santa Ana, California, and was noted at its inception for spearheading the prominence of BMX bicycles, later for developing a range of bikes around its "triple triangle" design, and at the end of its independent history, winning a commission to manufacture a $30,000 carbon fiber ...
Specialized also introduced the first major production mountain bike in the world, the Stumpjumper, in 1981. Like the Sequoia and Allez, the Stumpjumper was designed by Tim Neenan and based on an early Tom Ritchey design. Specialized continues to produce bikes under the Stumpjumper name, including both hardtail and full-suspension models. [8]
Most bikes have positive trail, though a few, such as the two-mass-skate bicycle and the Python Lowracer, have negative trail. [ 12 ] Trail is often cited as an important determinant of bicycle handling characteristics, [ 13 ] [ 14 ] and is sometimes listed in bicycle manufacturers' geometry data.
L – Rupp manufactured two L-series dirt bikes in 1973, the L80 and L100. Both bikes used 2-cycle Fuji engines, in 80 and 100cc sizes. They were equipped with four- and five-speed manual transmissions, respectively. SS – The SS-5 was Rupp's only dirt bike that used a Tecumseh engine and automatic transmission. The engine was a Tecumseh HS50 ...