hi all there seems to be a lot of conffusion about rollers and tumblers so ear we go a tumbler will perform up to 3 or 4 tumbles quite slow and gracefull.
where as a roller will wrap up into a tight ball and spin at an amazing speed and cover any thing up to 30 or 40 foot.
also it is thought they are suppose to be high flyers but if that was the case then there would be no comps as the judge needs to see them to score the brakes and quality.
hope this helps