I found that 13/52, was all, but giving up first gear. I had a first gear that could knead dough all day.
But in reality, it only shortened 1st gear too much for me. 1st gear became an annoying quick shift on most occasions.
Nothing high speed about it...just an ultra low gear for a high revving bike.
Dual sport tires don't compliment that gearing well.
I need a little more momentum to make it work for me...