gear inch

   a traditional unit for measuring the gears of bicycles. In low gears, the pedals are easy to turn but have to be turned very fast to achieve any speed; in high gears the pedals are harder to turn but don't have to be turned fast to achieve high speed. The gear value is computed in gear inches as the diameter of the drive wheel times the size of the front sprocket divided by the size of the rear sprocket, all measurements being in inches. (This is the same as the diameter of the drive wheel times the number of gear teeth on the front sprocket divided by the number of teeth on the rear sprocket.) This is the diameter that the drive wheel would need to have to give the same pedal effort as if the pedals were attached directly to the wheel, as on a child's tricycle. Values range from about 25 gear inches for the low gears on mountain bikes to more than 100 gear inches for the highest gears on racing bikes.

Dictionary of units of measurement. 2015.

Look at other dictionaries:

  • Gear inches — is a system that assigns numerical measurements to bicycle gear ratios, to indicate how low or high a gear is. With old fashioned penny farthing bicycles, the crankarms were directly attached to the large drive wheel. One turn of the pedals moved …   Wikipedia

  • Inch pedal — is a standard pedal used in mobile machinery with a hydraulic pilot pressure output proportional to the pedal position or an electronic pedal with a proportional electric signal output. The pedal is used in hydrostatic transmissions to… …   Wikipedia

  • Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …   Wikipedia

  • Gear pump — [ Gerotor pump] A Gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications. Gear pumps however are also widely used in chemical installations to pump… …   Wikipedia

  • Gear ratio — The gear ratio is the relationship between the number of teeth on two gears that are meshed or two sprockets connected with a common roller chain, or the circumferences of two pulleys connected with a drive belt. General description In the… …   Wikipedia

  • Fixed-gear bicycle — A fixed gear bicycle or fixed wheel bicycle, is a bicycle without the ability to coast. The sprocket is screwed directly on to the hub and there is no freewheel mechanism. A reverse thread lockring is usually fitted to prevent the sprocket from… …   Wikipedia

  • Arresting gear — (A.K.A. A Gear ) is the term used for mechanical systems designed to rapidly decelerate an aircraft as it lands. Arresting gear on aircraft carriers is an essential component of naval aviation, and it is most commonly used on CATOBAR and STOBAR… …   Wikipedia

  • Nine Inch Nails live performances — Nine Inch Nails live band Background information Origin Cleveland, Ohio, USA Genres …   Wikipedia

  • Actuaciones en directo de Nine Inch Nails — Nine Inch Nails (habitualmente abreviado NIN) es una banda estadounidense de rock industrial formada por Trent Reznor en 1988 en Cleveland, Ohio. Las actuaciones en directo de Nine Inch Nails contrastan con su aspecto de estudio:[1] …   Wikipedia Español

  • Metal Gear (series) — nihongo| Metal Gear |メタルギア is a critically acclaimed series of stealth games created by Hideo Kojima and developed and published by Konami. In the series, the player takes control of a Special Forces Operative (Solid Snake in most games)… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.