Basically a newbie using a kmart type bike. I have a decent road bike that I go for 75 milers on frequently. Not really a mountain biker. I need a bike for an adventure race with some single track and trail. I will ride 100 miles, run/walk 50 miles, paddle 30, and climb and orienteer. This is over 60 hours. What bike would you recommend? I will get a used and am not willing to spend much ...


