Originally Posted by
Wintersport
Yep, the 26" slicks or city tires will help. Also consider some changes to your front chain rings and rear cassette cogs.
Bigger chain ring(s) in front will give you a faster top end speeds ....
What cassette cogs do you have in the rear ?
Good thinking, though concern over top-end speed on a cruiser seems misplaced!
For a true cruiser look and feel, as others have mentioned, go with 26" tires that are thick (2"+) but relatively smooth.