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Clincher tires can be mounted on straight-side or crochet-type rims. Crochet-type rims are not the same as hooked-bead rims. Such tires are designated with their nominal section width and their nominal rim diameter, separated by a hyphen (-). Both are measured in millimeters. A typical example of a tire marking according to ISO 5775-1 is:
Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [29] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.
In the UK, BMX was a craze which took off in the early 1980s, specifically 1982 and 1983, when the BMX bike became the must-have bicycle for children and teenagers. [ citation needed ] The 1983 cult movie BMX Bandits helped establish the sport further worldwide.
The wheel size is sometimes erroneously called "650B" [8] [9] as a "marketing term" by some manufacturers for their 27.5", but the 650B size has traditionally been a designation for a 26 inch diameter (ISO ~ 40-584 demi-ballon tire) using the same ISO 584 mm rim [10] used by French tandems, Porteurs and touring bicycles.
A plus-size tire has a width of typically 2.5–3.25 inches (64–83 mm). Three bead seat diameters are available: 559 mm for 26+ , 584 mm for 27.5+ ( 650B+ ), and 622 mm for 29+ . They fill the gap between balloon and fat tires.
Diamondback was founded as a BMX brand in 1977 by Western States Imports in Newbury Park, California, which sold bikes under the Centurion (bicycle) brand. [7] Became a highly regarded name in BMX. [8] Dynacraft BSC – American Bicycle distributor; DYNO is a BMX bike and bike products company started by Bob Morales in 1982.