- offs ▁in ▁fair ing ▁design . ▁ ▁For ▁example , ▁a ▁longer ▁" tail " ▁on ▁the ▁fair ing ▁will ▁increase ▁the ▁total ▁side - wind ▁profile ▁and ▁total ▁side ▁forces , ▁but ▁can ▁reduce ▁the ▁percentage ▁force ▁acting ▁on ▁the ▁ste ered ▁whe els ▁and ▁so ▁an ▁improve ▁stability ▁in ▁side ▁wind s . ▁ ▁A ▁larger ▁fair ing ▁also ▁hur ts ▁weight ▁and ▁has ▁more ▁skin ▁drag ), ▁but ▁as ▁with ▁time - tri al ▁b icy cles , ▁worse ▁aer od ynam ics ▁but ▁better ▁handling ▁is ▁sometimes ▁a ▁good ▁trade - off . ▁ ▁Vel om ob iles ▁with ▁fair ings ▁that ▁are ▁mainly ▁for ▁weather ▁protection ▁can ▁use ▁a ▁more ▁u pr ight ▁se ating ▁position . ▁ ▁This ▁tends ▁to ▁improve ▁both ▁the ▁ability ▁to ▁see ▁and ▁be ▁seen . ▁ ▁However , ▁to ▁retain ▁stability ▁against ▁t ipping ▁( both ▁corner ing ▁and ▁cross - w inds ), ▁the ▁wheel ▁track ▁needs ▁to ▁be ▁wider ▁than ▁a ▁compar able ▁vel om obile ▁with ▁a ▁low ▁se ating ▁position . ▁ ▁In ▁turn , ▁this ▁may ▁make ▁the ▁vel om obile ▁quite ▁a ▁bit ▁wider ▁than ▁a ▁conventional ▁cycle . ▁ ▁" We ather " ▁protection ▁includes ▁cold ▁and ▁wet , ▁but ▁also ▁sh ading ▁from ▁sun . ▁ ▁Since ▁the ▁r ider ▁is ▁doing ▁work , ▁it ▁is ▁typically ▁des irable ▁to ▁have ▁at ▁least ▁some ▁cool ing . ▁ ▁Many ▁vel om ob iles ▁have ▁v ents ▁and ▁du ct s ▁which ▁allow ▁cool