How do I Find Out Which Tires Would Fit?
 

My hybrid came with 700x35C (37-622) tires.

There are no markings on the rim (unless I just can't find them).

How do I know which tires would fit on my existing rims so I can play around with different size tires? Or am I limited to 700x35C tires?

Of course by "size" I mean the width of the tire. I know plenty well that the 700c part can't change. :)

Go HERE and scroll down to the red and green matrix showing tire width on one axis and rim width on the other.