I had to be really careful, I went for a ride last night after work and the bike was so light that when I hit bumps it felt like the bike would jump to the side. I got on a flat run for about a mile and it rode like a breeze. On the hills switching gears was easy. The steel ride is so much heavier but alot more solid Im used to that. The new ride feels light and unstable but Im sure I will get used to moving the bike. At the end of the ten miles I had slight lower back pain and a flat tire, I must have rode on that for about three blocks before I realized it. I think an adjustment to the seat should knock out the back pain, we will see. Gotta get to the bike shop.