This was my husband's bike and he only rode it occasionally on the street. He never rode it on a trail. He did fall once and put some scratches on the top tube and on the handlebars, but otherwise the bike is in excellent condition and has not been ridden very much. The autofill on this website forces me to say that the rear derailleur is an Alivio, but as you can see in the pictures I've included, the rear derailleur shows Acera. The other information is correct on the pre-fill. The brake cables are on the outside of the tube and they are Tektro disc. The cassette is Shimano 9-speed 11-34. Th...