Single drum rollers 2016 1,144 h United States, Holland, Michigan
Single drum rollers 2016 1,390 h United States, Wichita, Kansas
Single drum rollers 2019 1,056 h United States, Waterloo, Iowa
Single drum rollers 2015 2,710 h United States, Richmond, Virginia
Single drum rollers 2015 729 h United States, Richmond, Virginia
Single drum rollers 2018 468 h United States, San Francisco, California
Single drum rollers 2013 975 h United States, Richmond, Virginia