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Q factor is a function of both the bottom bracket width (axle length) and the cranks. Bottom brackets axles vary in length from 102mm to 127mm. Mountain bike cranks are typically about 20mm wider than road cranks. [6] A larger Q factor (wider tread) will mean less cornering clearance (while pedaling) for the same bottom bracket height and crank ...
Q factor (bicycles), the width between where a bicycle's pedals attach to the cranks; q-value (statistics), the minimum false discovery rate at which the test may be called significant; Q value (nuclear science), a difference of energies of parent and daughter nuclides; Q Score, in marketing, a way to measure the familiarity of an item
Bicycle Quarterly is a magazine examining the history of bicycles, their design and evolution, with emphasis on Randonneuring bicycles. Articles evaluate equipment ...
In November 2008, Briton Joff Summerfield completed a 22,000 miles (35,000 km) round-the-world trip on a penny-farthing. Summerfield spent two-and-a-half years cycling through 23 countries, visiting locations including the Taj Mahal, Angkor Wat and Mount Everest. [56] Knutsford in England has hosted the Knutsford Great Race every 10 years since ...
Ross began making bicycles in 1946, [23] and by the late 1960s, manufactured about 1 million bicycles per year. [3] By 1985, it had sold 10 million bicycles. The company, still known as Chain Bicycle Corporation, marketed bikes under the Ross brand, [6] including children's, BMX, touring, cruiser, mountain, racing, wheelie, and stationary exercise bicycles.
According to a study a human at 70 kg (150 lb) requires about 60 watts to walk at 5 km/h (3.1 mph) on firm and flat ground, [6] while according to a calculator at kreuzotter.de the same person and power output on an ordinary bicycle will travel at 15 km/h (9.3 mph), [7] so in these conditions the energy expenditure of cycling is about one-third ...
The price of a new bicycle can range from US$50 to more than US$20,000 (the highest priced bike in the world is the custom Madone by Damien Hirst, sold at US$500,000 [10]), [11] depending on quality, type and weight (the most exotic road bicycles can weigh as little as 3.2 kg (7 lb) [12]).
Schwinn sold an impressive 1.5 million bicycles in 1974, but would pay the price for failing to keep up with new developments in bicycle technology and buying trends. With their aging product line, Schwinn failed to dominate the huge sport bike boom of 1971–1975, which saw millions of 10-speed bicycles sold to new cyclists. [ 8 ]