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Merida Big Seven mountain bike with Schwalbe Racing Ralph 27.5″ tires. 27.5 mountain bikes are mountain bikes which use a large volume tire that is approximately 27.5 inches in diameter, 56 mm wide (ISO 56-584 / 27.5 × 2.25) on an ISO 584 mm rim.
Besides the different tread patterns available on some mountain bike tires mentioned above, front and rear tire sets are available for road bikes with different tread patterns, tread compounds, and sizes for the front and rear wheels. [58] Other scenarios involve replacing a damaged tire, and leaving the other one unchanged.
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
3 ⁄ 32 in (2.4 mm) chains are generally used on bikes with derailleurs such as racing, touring, and mountain bikes. [17] (Fixed sprockets and freewheels are also available in 3 ⁄ 32 in (2.4 mm) widths, so fixed-gear and single-speed bikes can be set up to use the narrower and lighter 3 ⁄ 32 in (2.4 mm) chains.)
Mach 5 (speed), a mach number, 5 times the speed of sound; Mach Five, a racing car in the Speed Racer franchise; Mach-V, an alias of the Marvel Comics character Abner Jenkins "Mach 5" (song), a 1996 song by alternative rock band The Presidents of the United States of America; Wharfedale MACH 5, a loudspeaker in the Wharfedale MACH series
In aerodynamics, the normal shock tables are a series of tabulated data listing the various properties before and after the occurrence of a normal shock wave. [1] With a given upstream Mach number, the post-shock Mach number can be calculated along with the pressure, density, temperature, and stagnation pressure ratios.