Dhameystir weedhan soo socota: 2011 wuxuu arkay Harrison oo horumar ka sameynaya heer sare. Wuxuu ku guuleystay tartankiisii ugu horreeyay ee tartanka Koobka Adduunka ee UCI Track ee Beijing, isagoo ku guuleystay omnium. Harrison ayaa markii ugu horeysay ka qeyb galay tartanka UCI World Track Championships sanadkii
2011, oo uu ku guuleystay billad naxaas ah oo qayb ka ah Raadinta Kooxda. Waxaa loo doortay finalka ka dib markii xiddiga caadiga ah ee Ed Clancy xanuunsaday. Harrison ayaa sidoo kale kaalinta 11-aad ka galay tartanka.