Been following and want to do this... one rather dumb question.... my older mountain bike forks have open, wheel/axil ends with there flip tension tightening .... so not a through bolt. So the clamping force of this mount is enough to hold the weight of the bike there in an open ended "horse shoe" fork end?....seems like a big backroad potholed could knock it out? so that is why I think this might be a dumb question!