I surpose the best trials bike would most probably be the most expensive, but I think it's the bike you feel most comfortable on as you could have the best bike in the world but be know good on it. The most expensive 26" http://tartybikes.co.uk/product.php?produc...5&category_ The cheapest 26" http://tartybikes.co.uk/product.php?produc...;category_id=47
As far as I can see you want your son to start motorcross trials, this forum is for bike trials bikes. http://tartybikes.co.uk/product.php?produc...;category_id=47 But keep looking in as a few members do motorcross trials on here and could give you some advice.
http://tartybikes.co.uk/product.php?produc...;category_id=40 I've got the Echo Urbans and they are great I find that they are realy strong and can take a bashing I would give them 10/10 Hope this helps, Max.
Well i havn't had any experiance with the forks before, but reading the description they seem like descent forks. But it Recommends them for lightweight competiton riders only, so they might not be the ones so to speak for you. Hope this helps, Max