▁save ▁several ▁kil og rams ▁compared ▁to ▁other ▁designs . ▁ ▁A ▁wide ▁range ▁of ▁fib ers ▁may ▁be ▁used , ▁but ▁those ▁which ▁reduce ▁weight ▁while ▁retain ing ▁strength ▁and ▁t ough ness ▁often ▁increase ▁the ▁price ▁significantly — e . g ., ▁a ▁prem ium ▁of ▁ 1 0 0 0 ▁Eu ros ▁to ▁save ▁ 3   kg . ▁ ▁In ▁addition , ▁it ▁is ▁often ▁hard ▁to ▁seg reg ate ▁and ▁rec ycle ▁the ▁FR P ▁materials . ▁ ▁But ▁despite ▁the ▁cost ▁and ▁other ▁issues , ▁the ▁aer od ynamic ▁and ▁weight ▁advantages ▁mean ▁that ▁( as ▁of ▁ 2 0 1 7 ) ▁mon oco que ▁FR P ▁is ▁a ▁common ▁way ▁to ▁build ▁vel om ob iles . ▁ ▁As ▁of ▁ 2 0 1 7 , ▁most ▁vel om ob iles ▁are ▁tr icy cles ▁with ▁two ▁front ▁whe els . ▁ ▁A ▁tr icy cle ▁has ▁the ▁advantage ▁over ▁a ▁b icy cle ▁that ▁it ▁does ▁not ▁fall ▁over ▁when ▁stopped . ▁ ▁In ▁addition , ▁when ▁a ▁cross - wind ▁hits ▁a ▁fair ing , ▁it ▁makes ▁a ▁big ▁force ; ▁fa ired ▁tr icy cles ▁are ▁less ▁likely ▁to ▁get ▁blow n ▁over ▁than ▁fa ired ▁b icy cles . ▁ ▁Although ▁three ▁whe els ▁have ▁practical ▁advantages , ▁they ▁also ▁have ▁more ▁aer od ynamic ▁drag ▁than ▁two ▁whe els , ▁so ▁land ▁speed ▁record ▁cycles ▁are ▁often ▁b icy cles . ▁ ▁Although ▁four ▁whe els ▁were ▁used ▁as ▁far