Hi guys. I'm basically a newb to biking and to this website all together. i just have a few questions regarding training. You see, I'm a runner slowly adding in the triathlon and comptetive bike races into my training. So I'll obviously need a bike to train with. I just don't know whether to get a true mountain bike or a hybrid bike. Some people say going to the mountains and trails for all your training is the best way to go while others say a mixture of both trails and road is the best way to go. I live in a suburb with many trails but also with a lot of road races as well. So, the question is: Which type of bike should I get if I want to both train on it and be able to have a casual ride on(like with friends)? A mountain bike or a hybrid bike? Thanks!