Whakaotihia te rerenga e whai ake nei: I te tau 2011 i eke a Harrison ki te taumata matua. I wikitoria ia i tana whakataetae tuatahi i te huihuinga UCI Track World Cup i Beijing, i wikitoria i te omnium. Ko te putanga tuatahi o Harrison ki te UCI World Track Championships i tae mai i te
I te tau 2011, i riro i a ia he mētara parahi hei waahanga o te Team Pursuit. I tohua ia ki te whiringa toa i muri i te turanga o Ed Clancy i mate. I mutu hoki a Harrison i te tekau ma tahi i te omnium.