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  2. Bicycle performance - Wikipedia

    en.wikipedia.org/wiki/Bicycle_performance

    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. Pedelec - Wikipedia

    en.wikipedia.org/wiki/Pedelec

    Pedelec hub motor with gearbox Smart e-bike motor. Almost exclusively, pedelecs use DC motors, using commutator-less and brush disc motors, which are suitable for direct drive, and brush motors with gears. Hub motors were available with internal gears but most present ones use many poles, e.g. 84 electromagnets in the stator and 84 thin magnets ...

  4. Electric bicycle - Wikipedia

    en.wikipedia.org/wiki/Electric_bicycle

    An Electric Pusher Trailer is an e-bike design which incorporates a motor and battery into a trailer that pushes any bicycle. One such trailer is the two-wheeled Ridekick. Other, rarer designs include that of a 'chopper' styled e-bike, which are designed as more of a 'fun' or 'novelty' e-bike than as a purposeful mobility aid or mode of transport.

  5. Our Gear Editors Agree—These Are the Best Affordable ... - AOL

    www.aol.com/lifestyle/10-best-electric-bikes...

    The best cheap electric bikes come from brands like Aventon, Buzz, Cannondale, and more. These cheap electric bikes are (almost) all under $1,800.

  6. Comparison of hub gears - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_hub_gears

    e-bike Shimano Nexus 4 Speed 4 184% 1st gear City Shimano Nexus Inter-3: 3 187% 2nd gear 1220 g City SRAM Spectro E12 (Elan) 1995 1999 12 339% 3500-4000 g City SRAM i-Motion 9: 2005 2012 9 340% 2000g (w/o brake)-2400g (with coaster brake) City SRAM G8: 2012 2015 8 260% 2088-2180 g [16] [17] City SRAM G9 2014 2015 9 292% 2088 g [17] City, Sport

  7. Motorized bicycle - Wikipedia

    en.wikipedia.org/wiki/Motorized_bicycle

    The Consumer Product Safety Act defines the term low speed electric bicycle as a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts (1 horsepower), whose maximum speed on a paved level surface, when powered solely by such a motor while ridden by an operator who weighs 170 pounds, is less than ...

  8. SAE J300 - Wikipedia

    en.wikipedia.org/wiki/SAE_J300

    The oil fails the test at a particular temperature if the oil is too viscous. The grade of the oil is that associated with the coldest temperature at which the oil passes the test. For example, if an oil passes at the specified temperatures for 10W and 5W, but fails at the 0W temperature, the oil is grade 5W. It cannot be labeled 0W or 10W.

  9. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    Today, motor oil in the US is generally sold in bottles of one U.S. quart (950 mL) and on a rarity in one-liter (33.8 U.S. fl oz) as well as in larger plastic containers ranging from approximately 4.4 to 5 liters (4.6 to 5.3 U.S. qt) due to most small to mid-size engines requiring around 3.6 to 5.2 liters (3.8 to 5.5 U.S. qt) of engine oil.