g ▁is ▁a ▁station ary ▁bi ke ▁that ▁was ▁introduced ▁in ▁ 2 0 1 7 . ▁It ▁uses ▁a ▁fly w heel ▁similar ▁to ▁the ▁one ▁found ▁on ▁Con cept 2 ' s ▁ind oor ▁ro wer ▁and ▁Ski Er g . ▁ ▁Online ▁log book ▁and ▁world ▁rank ings ▁Starting ▁ 1 9 9 9 , ▁the ▁company ▁began ▁facil it ating ▁a ▁community ▁of ▁home - based ▁row ers ▁who ▁maintain ▁online ▁logs ▁hosted ▁on ▁the ▁Con cept 2 ▁website . ▁ ▁Their ▁performances ▁are ▁ranked ▁in ▁real ▁time ▁on ▁the ▁Con cept 2 ▁website . ▁The ▁total ▁number ▁of ▁meters ▁logged ▁in ▁the ▁ 2 0 1 4 ▁season ▁( May ▁ 1 , ▁ 2 0 1 3 ▁– ▁April ▁ 3 0 , ▁ 2 0 1 4 ) ▁exceed ed ▁ 1 0 . 2 ▁billion , ▁by ▁over ▁ 4 7 , 0 0 0 ▁users . ▁There ▁are ▁hundreds ▁of ▁clubs ▁that ▁row ers ▁may ▁affili ate ▁with ▁when ▁register ing ▁with ▁the ▁ranking ▁system . ▁M eters ▁can ▁be ▁logged ▁on ▁the ▁ind oor ▁ro wer , ▁on ▁water , ▁on ▁the ▁Ski Er g ▁or ▁on ▁snow . ▁Con cept 2 ▁also ▁hosts ▁year - round ▁online ▁challeng es ▁aim ed ▁at ▁motiv ating ▁row ers . ▁ ▁Online ▁Ch alleng es ▁Con cept 2 ▁organ izes ▁a ▁number ▁of ▁challeng es ▁throughout ▁the ▁year . ▁Many ▁of ▁these ▁reward ▁consist ency ▁and ▁total ▁meters ▁instead ▁of ▁speed , ▁giving ▁an ▁extra