Single drum rollers 2015 1,251 h United States, Ottumwa, Iowa
Single drum rollers 2018 649 h United States, Des Moines, Iowa
Single drum rollers 2017 1,778 h United States, Des Moines, Iowa
Single drum rollers 2018 896 h United States, Des Moines, Iowa
Single drum rollers 2018 1,383 h United States, Des Moines, Iowa
Single drum rollers 2018 991 h United States, Ottumwa, Iowa