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  2. Low rolling resistance tire - Wikipedia

    en.wikipedia.org/wiki/Low_rolling_resistance_tire

    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.

  3. Bicycle performance - Wikipedia

    en.wikipedia.org/wiki/Bicycle_performance

    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.

  4. Tire load sensitivity - Wikipedia

    en.wikipedia.org/wiki/Tire_load_sensitivity

    Tire load sensitivity. Tire load sensitivity describes the behaviour of tires under load. Conventional pneumatic tires do not behave as classical friction theory would suggest. . The load sensitivity of most real tires in their typical operating range is such that the coefficient of friction decreases as the vertical load, Fz, increas

  5. Relaxation length - Wikipedia

    en.wikipedia.org/wiki/Relaxation_length

    Plot showing lateral force building up as a bicycle tire rolls forward at a 2.4º slip angle. The results from three separate test runs are superimposed. Relaxation length is a property of pneumatic tires that describes the delay between when a slip angle is introduced and when the cornering force reaches its steady-state value. [1]

  6. SAE J2452 - Wikipedia

    en.wikipedia.org/wiki/SAE_J2452

    SAE J1269 and SAE J2452 performed on new tires. SAE J2452 is a standard defined by the Society of Automotive Engineers [1] to measure the rolling resistance of tires. [2] Where the older standard, SAE J1269, produces measurements of rolling resistance under steady-state (i.e. thermally equilibrated) operating conditions, SAE J2452 produces measurements during a transient history of speed that ...

  7. Bicycle tire - Wikipedia

    en.wikipedia.org/wiki/Bicycle_tire

    If a tire is inflated to 4 bar (400 kPa; 58 psi) at sea level, the absolute internal pressure would be 5 bar (500 kPa; 73 psi) (+25%), and this is the pressure that the tire would need to contain if it were moved to a location with no atmospheric pressure, such as the vacuum of free space. At the highest elevation of commercial air travel ...

  8. Rolling resistance - Wikipedia

    en.wikipedia.org/wiki/Rolling_resistance

    Dimensions - rolling resistance in tires is related to the flex of sidewalls and the contact area of the tire [58] For example, at the same pressure, wider bicycle tires flex less in the sidewalls as they roll and thus have lower rolling resistance (although higher air resistance). [58]

  9. Cold inflation pressure - Wikipedia

    en.wikipedia.org/wiki/Cold_inflation_pressure

    Cold inflation pressure is a gauge pressure and not an absolute pressure. This article focuses on cold inflation pressures for passenger vehicles and trucks. The general principles are, of course, applicable to bicycle tires, tractor tires, and any other kind of tire with an internal structure that gives it a defined size and shape (as opposed ...