if you're doing 100 miles, try and get the bike to feel comfortable to the point that you'll feel you can easily do infinite miles without discomfort, you should able to finish a ride without a lots of discomfort and wasted energy.
...and go for a test ride. I find a bike can feel setup too big (too much seatpost/too long stem) until you've been riding for 2 hours. Then it feels right.
...and go for a test ride. I find a bike can feel setup too big (too much seatpost/too long stem) until you've been riding for 2 hours. Then it feels right.