a type of pedelec (= a bicycle with an electric motor that helps the rider turn the pedals), on which you can travel at a higher speed than you can with a basic pedelec

Speed pedelecs are classed under UK law as mopeds. 根据英国法律，速度型电动自行车被归类为轻便摩托车。

S-pedelecs have a maximum assisted speed of 45km/h, and more powerful motors. 速度型电动自行车的最高辅助速度为45公里/小时，发动机功率更大。