The bike is not a low end bike. It is a 2007 Mt Fuji Pro with carbon frame made by Fuji. I must have used the wrong term, so please assume it is a freehub. The bike is 21-speed, 9 cogs, 3 rings. It has disk brakes. Although I don't know much about mountain bikes I want to get a good wheel because I am starting to ride very often and quite hard.
Thanks
Jesus