Father Jack wrote:
Double is double ring chainset. Triple is one with three chainsets
Fixies are like BMX's, single front and single rear. You can get ones with freewheel or fixed wheel. Not sure what compact is, I think means the gears are close together.
fixie is a bike with one gear and a fixed wheel.
single speed is a bike with one gear but can freewheel.
a double is the number of cogs on the chainset, normally 38/53 or 42/52
a compact has two cogs on the front but of a smaller size.
a triple has three cogs on the front giving a bigger range.
Wikipedia is your friend:http://en.wikipedia.org/wiki/Crankset
A fixie is a f***ed up pixie
They're types of bra.
You don't see the triple very often, but it's worth it when you do.