Maxxis Hookworm tires will not work on frames that will not accept a 2.5 wide tire. You can get from any LBS tires as thin as 1.25" IRC, and Tioga both makes street tires that thin. They make a wrold of difference rather than riding semi slick, or wide street tires. Semi Slicks are good if you enocounter varied terrain, but for street specific low roling resistance a 1.9 or bigger tire will be smoother but high resistance.