Hey everyone  My name is simon, and i know nothing about any sort of bike.  Now i have that out in the open i would like some help in starting casual trials biking.  I live in the north east of england, with the mackem contingient in sunderland, and have recently been interested in getting a mountain bike for just riding around on, trying to get a little exercise whilst doing so wouldnt hurt either .  but whilst searching around the internet for something that is affordable i came across trials bikes.  i remember watching moto trials when i was very little and got a little interested in it , but since then i sort of forgot about it as i grew older, i am now 19.  but like i say, i came across trials bikes when i was looking for a mountain bike, and thought it looked like fun, the added risk involved also appeals to me too.   since i am 19, i dont really know if it is too late for me to start or if my asthma will restrict me from trying to take part.  but i would really like to see if i can actually acomplish it if i set my mind to doing it.  since i know nothing about these sorts of bikes i wouldnt know what would be a good starter for a complete novice who would like to learn how to upgrade, ride and trial on a bike.  i am 6ft4" tall and last time i checked i weighed between 12 and 13 stone.  my budget is quite small being between £150 and £300, but would be able to upgrade as i got better.  i dont know if this post made any sense to you, hopefully it did and i can soon start a long trials adventure   any sort of help or advice would be great  thanks, simon