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@gbj_tester
Zirbel 53.037 at Aguascalientes for a new US record
http://velonews.competitor.com/2016/09/news/zirbel-sets-new-u-s-hour-record_420874
http://velonews.competitor.com/2016/09/bikes-and-tech/pro-bike-gallery-tom-zirbels-hour-record-ride_420878