I just started riding 2 weeks ago and bought myself a Trek Wahoo 29er. 1st ride was 1.3 miles around the circle I live on. It's been 2 weeks and now my longest ride has been 8 miles. I average approx 9.5 miles an hour and plan on doing 10 miles on Saturday which will be week 3. I'm 5'8" and 260lbs. I used to be very active, ran 3 marathons, weight lifting, all sports but in the last 5 years haven't done much of anything but work. Couple questions?
1. should I replace the tires on my mtb? I never go off road and have no plans to. I ride bike paths.
2. will bar ends provide any comfort on longer distances?
3. I also ride the LifeFitness upright bike at my gym and it seems I can pedal much faster about 14 mph for 30 minutes. Is this good to train on? I would like to eventually be able to ride 50 miles above a 10 mph pace.