I would assume it is possible to make some sort of mathematical calculation so that you know how far you can make. however, things i think you would have to add into the calculation are as follows: distance you can gap flat to flatgravityheight difference'fresh-ness' of muscleswind resistancetyre pressure (will more or less pressure give you better gappage)total bike and body weight at exact moment of take off (would a lighter bike or body make it easier to gap further) i think there is probably more. and ill probably get shot the f**k down by an engineer, however bring it on