▁spe eds ▁of ▁the ▁chain ▁drive ▁or ▁internal ▁ge ared ▁hub s ▁( e . g . ▁R oh lo ff ▁ 1 4 ▁speed ▁hub ). ▁ ▁While ▁an ▁electric - ass ist ▁unit ▁does ▁add ▁extra ▁weight ▁to ▁the ▁vel om obile , ▁it ▁is ▁somewhat ▁offset ▁by ▁the ▁flex ibility ▁it ▁also ▁provides , ▁especially ▁during ▁hill ▁clim bs ▁and ▁stop - and - go ▁traffic . ▁Due ▁to ▁vast ly ▁better ▁aer od ynam ics ▁of ▁vel om ob iles ▁the ▁range ▁of ▁a ▁similar ▁electric ▁assist ▁unit ▁and ▁similar ▁battery ▁in ▁a ▁vel om obile ▁can ▁be ▁about ▁ 5 0 % ▁to ▁ 1 0 0 % ▁higher ▁compared ▁to ▁u pr ight ▁b icy cles ▁or ▁un fa ired ▁rec umb ents . ▁ ▁In ▁events ▁like ▁the ▁R AC V ▁Energy ▁Break through ▁and ▁the ▁F ras er ▁Coast ▁Technology ▁Challenge , ▁there ▁are ▁entire ▁categories ▁dedicated ▁to ▁electric ▁and ▁other ▁hy brid ▁power ed ▁vel om ob iles . ▁ ▁The ▁legal ▁definition ▁of ▁" b icy cle " ▁often ▁includes ▁vel om ob iles , ▁but ▁laws ▁covering ▁cycles ▁with ▁electric ▁assist ▁vary ▁widely ▁across ▁countries ▁and ▁often ▁within ▁a ▁country ▁and ▁even ▁between ▁cities ▁in ▁a ▁region . ▁ ▁For ▁example , ▁a ▁specific ▁vehicle ▁may ▁be ▁a ▁" b icy cle " ▁in ▁one ▁area , ▁a ▁" low - speed ▁ped al - ass isted ▁cycle " ▁in ▁another ▁area , ▁and ▁a ▁" m oped " ▁in ▁yet ▁a