I think my favorite Giant Simple is Viperocco's. I love the chain guard on crossthreaded88's bike. After the first series they put in the tapered top tube which is fairly sizeable. On Viperocco's they still taper the top tupe but more subtly. It looks like they might have shortened the top tube on the latest version. Tektro makes the 559 double pivot sidepull brake for really long and large tire installations. To measure your brake installation you need to measure from the center of the brake bolt mounting hole in the fork and rear brake/fender cross brace to the middle of the rim in millimeters. Brakes are sold using this distance to define the model you need. It is a tricky measurement since you must go around your tire. A measuring caliper will do the trick. Very clean Schwinn Speedster.