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  2. Junior Dragster - Wikipedia

    en.wikipedia.org/wiki/Junior_Dragster

    The Junior Dragster or Jr Dragster is a scaled-down version of the top fuel dragster. The cars were developed in New Zealand in 1988, with classes developed by the New Zealand Hot Rod Association. [1] The National Hot Rod Association in the USA began sanctioning the class in 1991, with the JDRL (Junior Drag Racing League). [2]

  3. Top Fuel - Wikipedia

    en.wikipedia.org/wiki/Top_Fuel

    Two Top Fuel dragsters side by side during an NHRA event in 2012. Top Fuel is a type of drag racing whose dragsters are the quickest accelerating racing cars in the world and the fastest sanctioned category of drag racing, with the fastest competitors reaching speeds of 338.94 miles per hour (545.5 km/h) and finishing the 1,000 foot (304.8 m) runs in 3.641 seconds.

  4. Gear inches - Wikipedia

    en.wikipedia.org/wiki/Gear_inches

    For bicycles with 700c wheels, some cyclists quote gear inches based on a nominal wheel diameter of 27 inches, corresponding to the old British tire size of 27 x 1 + 1 ⁄ 4" (ETRTO 630). Strictly speaking, the rolling diameter of a 700c wheel may be significantly higher or lower than 27", depending on the tire size, e.g. nearly 27.5" for a ...

  5. Drag racing - Wikipedia

    en.wikipedia.org/wiki/Drag_racing

    These cars race at 1/8 mile or 1/16 mile. NHRA new class for Juniors is JR COMP running 6.90s at a top speed of 110 miles per hour (180 km/h) (1/8 mile or 1/16 mile). A complete listing of all classes can be found on the respective NHRA and IHRA official websites. Dragster engine with dual-plug heads, dual ignition magnetos, and intake snorkel

  6. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...

  7. Comparison of hub gears - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_hub_gears

    5th gear 1550-2040 g City Shimano Nexus Inter-7: 1995 7 244% 1465-1860 g City Shimano Nexus Inter-5E 2019 5 263% 60 Nm 1st gear 1650 g 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)-

  8. Funny Car - Wikipedia

    en.wikipedia.org/wiki/Funny_Car

    Compression ratios vary from 6:1 to 7:1. The engines in Funny Cars commonly exhibit varying piston heights and ratios that are determined by the piston's proximity to the air intake. Funny Cars have a fixed gear ratio of 3.20:1 and have a reversing gear; power is transmitted from engine to final drive through a multiple staged clutch which ...

  9. Pro stock - Wikipedia

    en.wikipedia.org/wiki/Pro_stock

    Allen Johnson's Mopar Dodge Avenger Pro Stock. Pro stock is a class of drag racing featuring "factory hot rods".The class is often described as "all motor", due to the cars not using any form of forced induction such as turbocharging or supercharging, or other enhancements, like nitrous oxide, along with regulations governing the modifications allowed to the engines and the types of bodies used.