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When measured by using these standard test practices, most new passenger tires have reported RRCs ranging from 0.007 to 0.014. [2] In the case of bicycle tires, values of 0.0025 to 0.005 are achieved. [3] These coefficients are measured on rollers, with power meters on road surfaces, or with coast-down tests.
The fitness and cadence of the rider, bicycle tire pressure and sizes, gear ratios, slope of the terrain affect the overall speed of the rider. A person pedalling with 100 W power can achieve 5.5 m/s on a roadster, 7.5 m/s on a racing bicycle, 10 m/s with a faired HPV and 14 m/s with an ultimate HPV.
Production bicycle tires at 120 psi (8.3 bar) and 50 km/h (31 mph), measured on rollers 0.0050: Dirty tram rails (standard) with straights and curves [citation needed] 0.0045 to 0.0080 [29] Large truck tires 0.0055 [23] Typical BMX bicycle tires used for solar cars 0.0065 [30] EU passenger car tyre label fuel efficiency class A (upper limit)
Silca [1] is a cycling parts and accessories manufacturer. They were founded in 1917 by Felice Sacchi just outside of Milan, Italy. SILCA has been an innovator in many aspects starting by being the first company to put gauges on pumps, [2] the first to create a high pressure frame pump, [3] and more recently the first to have a valve controlled CO 2 inflator. [4]
Air pressure in an automobile tire relative to atmosphere (gauge pressure) [citation needed] +210 to +900 kPa +30 to +130 psi Air pressure in a bicycle tire relative to atmosphere (gauge pressure) [57] 300 kPa 50 psi Water pressure of a garden hose [58] 300 to 700 kPa 50–100 psi Typical water pressure of a municipal water supply in the US [59]
Bicycle tires may be designed for riding on roads or over unimproved terrain and may be mounted on vehicles with more than two wheels. There are three main types: clincher, wired and tubular. [41] Most bicycle tires are clincher and have a bead that presses against the wheel rim. An inner tube provides the air pressure and the contact pressure ...
Colorized tire footprint pressure distribution. The contact patch is the portion of a vehicle's tire that is in actual contact with the road surface.It is commonly used in the discussion of pneumatic (i.e. pressurized) tires, where the term is used strictly to describe the portion of the tire's tread that touches the road surface.
Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle, and is one measure of its potential mobility, [1] especially over soft ground. It also applies to the feet of a walking person or machine. Pressure is measured in the SI unit of pascals (Pa).