Easy--avon MKII. It comes in an 18" and has all of your desired characteristics.
sojerscraper said:im running an 18" rim on the rear of my bike. im looking for a high profile tire with an old style tread, something a little more meaty. one that is tall but not too wide (dont want chain clearance issues). i have a dunlop TT100 on it now but i think it looks a little too skimpy. any recommendations?