What i can think of is that it's reasonably expensive, not that downhill or DJ ain't, but that is an issue. Also, it takes a long time to get good enough to anything vaguely impressive trialswise so that deters people. Only other thing is that the majority of trials riding isn't very "extreme" in that we don't tend to jump huge distances on our rigs or owt ( with the exception of few, CLS in mind personally), plus it's more of a refined, technique based sport rather like gymnastics as opposed to... say.. pig wrestling style DH Mark. P.S. although i'd love for the sport to grow, it is nice belonging to a sort of lol 'elite minority'....even if we do get taunted by the hoards of BMXers at the skateparks and the likes ha