ive been riding an old raliegh m-80 for the last three years or so ive found it to be ideal because its not worth a lot of money and has a steel frame and stands up to the beating it get with curbs bike racks other bikes and such its also survived being hit by a car three times, but i definately suggest steel frame which ever type of frame is choosen yes it may weigh a little more but it will be around a little longer