Got it there really, 24 has always been aimed at street because thats where that size wheel excells. For natural, a stock will always win because the larger wheels make it better for rolling across big rocks, so 24 has really just snugged itself into street trials because the wheels are big enough to roll over things but small enough to keep the bike light and flicky-A perfect comprimise Thats not to say that 24s dont ride well for natural, because they really do ride fine and wont hinder your progression.