Been looking at theses cheap onebot s6 ebikes I like the look of them with the small rear shock mount etc now can any give me feedback please as looking at one for the wife . Now can anyone explain the difference between the s6 and s9 ? Is it just range . Is the s9 worth the extra money we only ride on gravel path ways around country parks in the uk no off road stuff . Is there any uk stockist . Many thanks