Atrophy Gearing, 2003 Hornet

Start date 13/10/2008 21:01:54    Last updated 09/10/2018 16:22

This gear calculator is set as default to the 2003 Hornet

When first run, it shows the mph for every 1000 rpm in each gear.

If you wish to set it for any other bike,
Select:

then press "submit". You will be returned a page with the correct number of boxes to fill with all the tooth counts of all the gears (or chain wheels). Fill these in, and the parameters for the rear wheel and tyre, then press "submit" again. Any non-default entries will be highlighted.

To reset everything back to the defaults, use the "Default to 2003 Hornet" link.

By default, the table on the right will show the mph for each 1000 rpm in all the gears. The increment and the highest rpm may be changed by editing the "rpm increment" and "maximum rpm" values and pressing the "submit" button

There is some error checking on inputs. If it thinks an entry is incorrect, it will highlight the area in red and ask for it to be corrected.

Current limits:

ParameterRangeUnits
Wheel diameter 1 to 100inches
Wheel width 1 to 500mm
Wheel aspect ratio10 to 1000%
Number of transmission ratios 1 to 10 
Number of gearbox ratios 1 to 10 
Number of teeth on any gearwheel 1 to 1000 
Maximumn rpm10 to 50000rpm
Rpm increment10 to 13000rpm
Maximum speed (or leave blank)40 to 300mph

Numbers of Gearings
Number of transmission ratios
Number of gearbox ratios
Transmission Ratios
WhichInputOutput
1st
2nd
Gearbox Ratios
GearInputOutput
1st
2nd
3rd
4th
5th
6th
Wheel/tyre Dimensions
ParameterValueUnits
Wheel diameterinches
Tyre widthmm
Aspect ratiopercent
Display Parametersrpm incrementmax rpmmax mph
 010002000300040005000600070008000900010000110001200013000
1st0.004.839.6514.4819.3124.1428.9633.7938.6243.4448.2753.1057.9262.75
2nd0.006.8513.7120.5627.4234.2741.1247.9854.8361.6968.5475.3982.2589.10
3rd0.008.5817.1725.7534.3342.9151.5060.0868.6677.2485.8394.41102.99111.58
4th0.0010.3320.6630.9941.3251.6561.9872.3182.6492.97103.30113.63123.96134.29
5th0.0011.7823.5635.3447.1258.9070.6882.4694.24106.02117.80129.58141.36153.14
6th0.0013.1926.3939.5852.7865.9779.1692.36105.55118.74131.94145.13158.33171.52
Default to 2003 Hornet

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