It has plenty of oomph to get bike and rider (125kg) up hill which was the reason I chose it. Did wonder whether more speed was on offer though.Slow motor, you can expect 30 km/h tops if you are light weight.
201 rpm is 25km/hr at 48v. With a fully charged battery at about 52v, you should see about 28km/h. If you want more speed, you need more voltage or the 328 rpm version.Q128C 48v 201. It starts to back off at 26km and the assist is gone by 28 ish.