have one bike running 44/16 with 180 cranks, my new bike is running 42/14 with 165 cranks.

44x16 is =72.4,

42x14 is =81.0

longer cranks means you can push a larger gear, shorter cranks means push a sprint gear.

so the longer crank arms and low ratio mean you can go up hills alot easier and spin alot.

now you are pushing a harder gear and can put more power behind the gear now.

S/F<
CEYA!