The longest seat tube I could find was on the Atomlabe Pimp 2 at 13.7 inches. I want the same but with some pedaling capability. That is a steel bike. You can get a little longer seat tube if you go AL. Check the RMB flows on jensonusa.com.
Funny thing that...kremecheze said:I Just Got A 2010 P1 And It Feels Pretty Big,its Got A Pretty Long Toptube On It And Long Cranks For Us Tall Guys,i'm 6'4 And It Feels Good,throw Some 3' Rise Bars On It And You Should Be Good