Wheel size is the outside diameter (or circumference) of the rear wheel with tyre fitted. You can measure the circumference by marking a point on the tyre and the ground next to it with chalk, wheeling the bike forward one revolution and measuring the linear distance travelled. Enter the wheel size in whatever units you wish to see the resulting gear ratios (see below).
Front cogs should be a space-separated list of the number of teeth on each front chainring.
Rear cogs should be a space-separated list of the number of teeth on each sprocket of the rear casette.
If hub gears are fitted, the Hub gear ratios field should be a space-separated list of the gear ratios (as decimal fractions).
The numbers shown in the Gears field are the computed Gear Development ratios - the distance the bike travels for one revolution of the cranks for each of the cog combinations (and hub ratios if used). The gears available with each front cog (chainring) are shown in a separate row.
The gear ratios are calculated in the same units as was used to enter the wheel size (inches or cms).
The numbers shown in the Gear spacing field are the percentage increments between the cogs of the rear cassette only. This is computed to give an indication of how regular the steps between gears will seem. Similar percentages will provide a similar increment in effort to maintain the same speed.
The Specification and Maintenance record fields are simply for you to record textual information. The Text menu enables you to make some minor changes to the text style. You can add links to web pages by inserting the URL (web address) of the page and then giving it the style Link. Right-click on a link to go to the linked page.
See the Help on the Home card for information on how to create new cards, delete unwanted cards and organise them in categories. Take care not to delete all of the Bike Cards or Category Cards!
NB. This is an early Beta release, tested only by the author: