Steel parts of this era were often high in quality. Indeed, for many years, Raleigh's slogan was "The All-Steel Bicycle". As recently as the 1960's, steel was favored for many of these parts, particularly by the British. The only reason steel is now used for these parts is to scrimp on costs. Nobody should have to ride a modern bicycle with steel rims, brakes or handlebars. Chromium-molybdenum or "cromoly" (CrMo) steel, also known by the numerical designation 4130, is particularly popular for high-quality bicycles.Īlthough steel is used for most high-quality bicycle frames, the use of steel instead of aluminum for many parts is often the result of penny pinching. Steels used in bicycle construction are commonly alloyed with chromium or manganese and molybdenum. Steel An alloy of iron and carbon, usually containing between 0.2 and 1.5 percent carbon, often with other constituents such as manganese, chromium, nickel, molybdenum, copper, tungsten, vanadium or other metals, depending on the characteristics desired. Stayer A bicycle used for motor-paced racing, usually behind a motorcycle. Stay A thin, usually straight, structural member: Seatstay, chainstay, fender stay, mixte stay. Star nuts are available in several diameters to fit different types of forks. Forks with carbon steerers generally come with special expansion plugs that serve the function of a star nut, without the sharp edges that might damage the fragile carbon steerer. Star nuts are only for use on metal steerers and should never be used on carbon steerers. If you ever need to remove a star nut, the easiest way is by driving it down and out the bottom of the steerer with a hammer and punch. The star-fangled nut has two barbed steel flanges that allow it to be forced downward into the steerer, but which prevent it from moving upward. The adjusting bolt screws into the "Star Fangled Nut." Star Fangled ® Nut A special nut that is designed to be hammered into the steerer of a bicycle with a thread less headset, such as a Dia Compe " Aheadset" ®.
Starley designed and built the "Rover," the first commercially successful rear-drive " safety" bicycle, which is the ancestor of all modern diamond-frame bicycles. He produced the first all-metal bicycle, and invented the tangent-spoked wheel, which is used to this day. James Starley was instrumental in the development of the high-wheeler bicycle. Starley Two members of the Starley family in England were great pioneers in the early days of cycling. For off-road riding, considerably more clearance is required. If the standover height is too tall for a given rider, mounting and dismounting are awkward and dangerous.Ĭonventional wisdom is that the standover height should permit 1-3 inches (2-8 cm) of clearance between the top tube and the crotch of a rider straddling the frame, for road use. Standover Height One of the prime dimensions of a bicycle, this refers to the height of the top tube above the ground. A piece may be additionally formed after it is stamped. Cheaper dropouts and many sprockets are stamped. Stamped Cut from a flat sheet, usually of metal, by a powerful machine which works like a cookie cutter. Stainless steel is also used for high quality control cables. Virtually all modern high-quality spoked wheels have stainless-steel spokes. The primary bicycle application for stainless steel is for spokes. Stainless steel also has somewhat lower yield strength than steel alloys optimized for that characteristic, and is somewhat more difficult to weld, so it has only rarely been used for frame tubes. Stainless steel is rust-resistant, and very tough, but is generally not the best choice in applications where surface hardness is of primary importance, such as bearings. Stainless Steel A family of steel alloys, usually containing 10-20% chromium, among other alloying elements. In the case of threadless headsets, the stack height also includes the height of the part of the handlebar stem that clamps to the steerer.
DEFINE STEM MOUNTING FREE
If a headset is chosen with a stack height greater than this difference, there may not be enough of the steerer free above the upper bearing race for the keyed washer and lock nut to be installed. With a conventional threaded fork, the steerer tube is longer than the head tube by some amount. Stack Height The stack height is the vertical space taken up by the headset. Stack bolt The stack bolts are the small bolts that hold the chainwheels to the spider of a crank. A - B - C - D - EF - G - H - IJKL - M - NO - PQ - R - S - T - UVWXYZ Up to previous page
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