Originally Posted by
vision646
I just started riding recently and I also struggled with this, so don't feel bad. I figure that they simply needed a new term for the new style of pedal and since the plastic cages were called clips and the new pedals didn't have the cages they were "clipless".
Why in the world are 27 inch tires bigger than 29 inch tires? That just makes my head hurt.
The late, great Sheldon Brown explains
here.