seems like with the 18 inch wheels you get the original 52 gear inches in the low gear and the high gear is almost pushing probably 80 gear inches. That thing is going to go like stink on a downhill. Fastest I went on a strida is 40km/h downhill and it was pretty stable as long as you relax and not have some death grip on it. else you got a really nice setup. Did you carry that wheel stand with you wherever you go in case of photo ops? 