Maras,

I agree with Dave, probably the biggest you can find. Test ride one if you
have the opportunity.

If you have the money for a custom bike (US $1500 or more) you might try
Zinn Cycles in Boulder, CO, USA.
Dial to the USA then 303-499-4349.

http://www.zinncycles.com

Even if you don't have the money for a custom bike, contact them. They can
probably answer your questions better than just about anyone else.

Bruce Lange

or

Bruce Klimaszewski - (if my great-grandfather had not changed his name)

Denver, Colorado, USA cyclist