I didn't really realize how good they were until I took them off to fit my new pedals in. My foot is slipping all over the place on bumps. With no suspension components on this basic entry-level trike, every road is a bumpy road. I might try those balloon style Schwalbe Big Apple tires after all.
I took such a steep climb during my trek this time that I could only pedal half a rotation! I had to brake in between and couldn't even set my rear emergency brake to take a photo! But at least at 23.5 GI (gear inch) I didn't have to roll up the hill with my hands like I did when I had the 28.6 GI from the stock freewheel.