Crankset question

[OakLeaf]

Chainring numbers are the number of teeth, same as the numbers for cassette cogs.

So if you're in your 48x12 - a nice round number that's probably your top gear - for every revolution of your pedals/cranks, your cassette (and thus your wheel) will travel four revolutions.

Downshift your RD several clicks to your 48x24 (you're not crosschaining now, are you? ). Now, for every revolution of your cranks, your wheel will travel TWO revolutions.

If you're in your 26x32, then your wheel will travel 13/16 of a revolution for every turn of your cranks.

More teeth in front = more teeth/chainlinks of travel per revolution = higher gear
Fewer teeth in back = more wheel travel per tooth/chainlink = higher gear