Well, I'm happy to announce that I rode 4.7 miles last night with DH and 6.3 miles this morning. Iris's bike broke in the begining of our ride, but we were able to get it back together so she could finish the ride. Her chain jumped track, then was possessed for the rest of the ride. It kept shifting from gear to gear. Took it to our bike shop and found out the chain was bent, which is why it kept shifting gears. We also got some advice on gear shifting and what not to do. Her bike's all better and our ride is on in the morning.