>>1497966>The size chart recommended the 18" frame from 5'7 to 6'should be fine then
try standing further back like pic related
>Would swapping the tires make sense? Is it difficult to do?gp 5000 are a nice upgrade if you ride mostly on pavement and mild dirt/gravel paths. it's easy as long as you get the right size for your rims, you'll need to learn how to take the tires on and off anyway to fix flats.
https://www.youtube.com/watch?v=96_2dAQvxvI 