brake help

just did, need to bleed now. I can't figure out how air in the lines would render the brakes useless? Not doubting anyone, just can't figure it out.

http://www.popularmechanics.com/automotive/how_to/4213448.html

you have to bleed your brakes because it is a hydraulic system...it's dependent on the fluid doing the work. If their is air in the system, the air basically compresses and decompresses, causing the fluid to do no work at all.. Once you get that air out, you'll be set! READ the link above! :wave: