RIDER HEIGHT FRAME SIZE TOP TUBE LENGTH
4'0" & Under Micro-Mini 15"-16"
4'0" - 4'6" Mini 16"-17"
4'4" - 4'10" Junior 17"-18.5"
4'8" - 5'4" Expert 18.5"-19.5"
5'4" - 5'10" Pro 20"-20.5"
5'10" & Over Pro XL or Pro XXL 20.5" & Over