[email protected] wrote:
> Informations guide for all cycling equipment,and many more ...
> http://bicycle-equipment.blogspot.com/
"Bicycle gearing
A modern racing bicycles is often equipped with a double-chainring crankset
at the front and a 9-speed or 10-speed cassette at the back. Since wheel
size is standardized, the gearing system is often described by stating the
number of teeth in the chainrings and cogs. For example, the front chainring
gearing is denoted "53/39", meaning that it has 53- and 39-tooth chainrings
on the crankset. The rear cassette is denoted by its smallest and its
largest. For example, a "12-25" means that the smallest has 12 teeth, and
the largest has 25 teeth. Nowadays 9- and 10-speed cassettes are
commonplace, which make the choice of intermediate gears less important than
when there were only 5 cogs available in a cassette. These cassettes
typically have a 7% step on the top 6 or 7 gears, and an 11% step on the
lower gears"
The above is the only content on this "blog". It obviously exists purely to
make money from the "Ads by Google".
~PB