in aug ural , ▁ 2 0 1 5 ), , ▁the ▁Ontario - based ▁Sub st ance ▁Project s ▁On F at bi ke Series ▁( OF BS ), ▁the ▁ 4 5 N r th ▁F at bi ke ▁Tri ple ▁Crown ▁race ▁series ▁and ▁the ▁UK ▁F at bi ke ▁Championships ▁( in aug ural , ▁ 2 0 1 3 ). ▁ ▁The ▁Id itar od ▁Tra il ▁Inv it ational ▁( former ly ▁known ▁as ▁Id it ab ike ▁and ▁Id itas port ▁Ext reme ▁and ▁Id itas port ▁Im possible ) ▁race ▁in ▁Al aska ▁has ▁grown ▁into ▁an ▁international ▁event ▁offering ▁an ▁extreme ▁, ▁ ▁and ▁ ▁distances . ▁The ▁event ▁sp ur red ▁the ▁creation ▁of ▁many ▁other ▁winter ▁ult ra ▁events ▁in ▁the ▁United ▁States , ▁Canada ▁and ▁Europe ▁that ▁are ▁accepted ▁qual ifiers ▁to ▁get ▁into ▁this ▁Inv it ational . ▁ ▁A ▁number ▁of ▁extreme ▁exped itions ▁have ▁also ▁been ▁made ▁on ▁fat b ikes . ▁In ▁December ▁ 2 0 1 2 ▁Eric ▁Lars en ▁attempted ▁to ▁ride ▁a ▁fat bi ke ▁to ▁the ▁South ▁P ole , ▁but ▁made ▁it ▁only ▁a ▁quarter ▁of ▁the ▁way ▁before ▁he ▁had ▁to ▁turn ▁around . ▁Maria ▁Le ij erst am ▁became ▁the ▁first ▁to ▁cycle ▁to ▁the ▁South ▁P ole , ▁across ▁the ▁South ▁P ole ▁Tra verse ▁road ▁on ▁a ▁tr icy cle ▁with ▁fat bi ke ▁t ires . ▁On ▁ 2 1 ▁January ▁ 2 0 1 4 ,